This is a live mirror of the Perl 5 development currently hosted at https://github.com/perl/perl5
add Perl_op_class(o) API function
[perl5.git] / dump.c
diff --git a/dump.c b/dump.c
index 91d2c2b..5a3f281 100644 (file)
--- a/dump.c
+++ b/dump.c
@@ -94,40 +94,43 @@ S_append_flags(pTHX_ SV *sv, U32 flags, const struct flag_to_name *start,
 /*
 =for apidoc pv_escape
 
-Escapes at most the first "count" chars of pv and puts the results into
-dsv such that the size of the escaped string will not exceed "max" chars
-and will not contain any incomplete escape sequences.
-
-If flags contains PERL_PV_ESCAPE_QUOTE then any double quotes in the string
+Escapes at most the first C<count> chars of C<pv> and puts the results into
+C<dsv> such that the size of the escaped string will not exceed C<max> chars
+and will not contain any incomplete escape sequences.  The number of bytes
+escaped will be returned in the C<STRLEN *escaped> parameter if it is not null.
+When the C<dsv> parameter is null no escaping actually occurs, but the number
+of bytes that would be escaped were it not null will be calculated.
+
+If flags contains C<PERL_PV_ESCAPE_QUOTE> then any double quotes in the string
 will also be escaped.
 
 Normally the SV will be cleared before the escaped string is prepared,
-but when PERL_PV_ESCAPE_NOCLEAR is set this will not occur.
+but when C<PERL_PV_ESCAPE_NOCLEAR> is set this will not occur.
 
-If PERL_PV_ESCAPE_UNI is set then the input string is treated as Unicode,
-if PERL_PV_ESCAPE_UNI_DETECT is set then the input string is scanned
-using C<is_utf8_string()> to determine if it is Unicode.
+If C<PERL_PV_ESCAPE_UNI> is set then the input string is treated as UTF-8
+if C<PERL_PV_ESCAPE_UNI_DETECT> is set then the input string is scanned
+using C<is_utf8_string()> to determine if it is UTF-8.
 
-If PERL_PV_ESCAPE_ALL is set then all input chars will be output
-using C<\x01F1> style escapes, otherwise if PERL_PV_ESCAPE_NONASCII is set, only
+If C<PERL_PV_ESCAPE_ALL> is set then all input chars will be output
+using C<\x01F1> style escapes, otherwise if C<PERL_PV_ESCAPE_NONASCII> is set, only
 non-ASCII chars will be escaped using this style; otherwise, only chars above
 255 will be so escaped; other non printable chars will use octal or
 common escaped patterns like C<\n>.
-Otherwise, if PERL_PV_ESCAPE_NOBACKSLASH
+Otherwise, if C<PERL_PV_ESCAPE_NOBACKSLASH>
 then all chars below 255 will be treated as printable and
 will be output as literals.
 
-If PERL_PV_ESCAPE_FIRSTCHAR is set then only the first char of the
+If C<PERL_PV_ESCAPE_FIRSTCHAR> is set then only the first char of the
 string will be escaped, regardless of max.  If the output is to be in hex,
 then it will be returned as a plain hex
 sequence.  Thus the output will either be a single char,
 an octal escape sequence, a special escape like C<\n> or a hex value.
 
-If PERL_PV_ESCAPE_RE is set then the escape char used will be a '%' and
-not a '\\'.  This is because regexes very often contain backslashed
-sequences, whereas '%' is not a particularly common character in patterns.
+If C<PERL_PV_ESCAPE_RE> is set then the escape char used will be a C<"%"> and
+not a C<"\\">.  This is because regexes very often contain backslashed
+sequences, whereas C<"%"> is not a particularly common character in patterns.
 
-Returns a pointer to the escaped text as held by dsv.
+Returns a pointer to the escaped text as held by C<dsv>.
 
 =cut
 */
@@ -144,16 +147,16 @@ Perl_pv_escape( pTHX_ SV *dsv, char const * const str,
     STRLEN wrote = 0;    /* chars written so far */
     STRLEN chsize = 0;   /* size of data to be written */
     STRLEN readsize = 1; /* size of data just read */
-    bool isuni= flags & PERL_PV_ESCAPE_UNI ? 1 : 0; /* is this Unicode */
+    bool isuni= flags & PERL_PV_ESCAPE_UNI ? 1 : 0; /* is this UTF-8 */
     const char *pv  = str;
     const char * const end = pv + count; /* end of string */
     octbuf[0] = esc;
 
     PERL_ARGS_ASSERT_PV_ESCAPE;
 
-    if (!(flags & PERL_PV_ESCAPE_NOCLEAR)) {
+    if (dsv && !(flags & PERL_PV_ESCAPE_NOCLEAR)) {
            /* This won't alter the UTF-8 flag */
-           sv_setpvs(dsv, "");
+            SvPVCLEAR(dsv);
     }
     
     if ((flags & PERL_PV_ESCAPE_UNI_DETECT) && is_utf8_string((U8*)pv, count))
@@ -169,12 +172,12 @@ Perl_pv_escape( pTHX_ SV *dsv, char const * const str,
        {
             if (flags & PERL_PV_ESCAPE_FIRSTCHAR) 
                 chsize = my_snprintf( octbuf, PV_ESCAPE_OCTBUFSIZE, 
-                                      "%"UVxf, u);
+                                      "%" UVxf, u);
             else
                 chsize = my_snprintf( octbuf, PV_ESCAPE_OCTBUFSIZE, 
                                       ((flags & PERL_PV_ESCAPE_DWIM) && !isuni)
-                                      ? "%cx%02"UVxf
-                                      : "%cx{%02"UVxf"}", esc, u);
+                                      ? "%cx%02" UVxf
+                                      : "%cx{%02" UVxf "}", esc, u);
 
         } else if (flags & PERL_PV_ESCAPE_NOBACKSLASH) {
             chsize = 1;            
@@ -204,7 +207,7 @@ Perl_pv_escape( pTHX_ SV *dsv, char const * const str,
                default:
                      if ( (flags & PERL_PV_ESCAPE_DWIM) && c != '\0' ) {
                         chsize = my_snprintf( octbuf, PV_ESCAPE_OCTBUFSIZE,
-                                      isuni ? "%cx{%02"UVxf"}" : "%cx%02"UVxf,
+                                      isuni ? "%cx{%02" UVxf "}" : "%cx%02" UVxf,
                                       esc, u);
                      }
                      else if ( (pv+readsize < end) && isDIGIT((U8)*(pv+readsize)) )
@@ -221,7 +224,8 @@ Perl_pv_escape( pTHX_ SV *dsv, char const * const str,
        if ( max && (wrote + chsize > max) ) {
            break;
         } else if (chsize > 1) {
-            sv_catpvn(dsv, octbuf, chsize);
+            if (dsv)
+                sv_catpvn(dsv, octbuf, chsize);
             wrote += chsize;
        } else {
            /* If PERL_PV_ESCAPE_NOBACKSLASH is set then non-ASCII bytes
@@ -230,7 +234,8 @@ Perl_pv_escape( pTHX_ SV *dsv, char const * const str,
               Or add a new API call sv_catpvc(). Think about that name, and
               how to keep it clear that it's unlike the s of catpvs, which is
               really an array of octets, not a string.  */
-            Perl_sv_catpvf( aTHX_ dsv, "%c", c);
+            if (dsv)
+                Perl_sv_catpvf( aTHX_ dsv, "%c", c);
            wrote++;
        }
         if ( flags & PERL_PV_ESCAPE_FIRSTCHAR ) 
@@ -238,29 +243,29 @@ Perl_pv_escape( pTHX_ SV *dsv, char const * const str,
     }
     if (escaped != NULL)
         *escaped= pv - str;
-    return SvPVX(dsv);
+    return dsv ? SvPVX(dsv) : NULL;
 }
 /*
 =for apidoc pv_pretty
 
 Converts a string into something presentable, handling escaping via
-pv_escape() and supporting quoting and ellipses.
+C<pv_escape()> and supporting quoting and ellipses.
 
-If the PERL_PV_PRETTY_QUOTE flag is set then the result will be 
+If the C<PERL_PV_PRETTY_QUOTE> flag is set then the result will be
 double quoted with any double quotes in the string escaped.  Otherwise
-if the PERL_PV_PRETTY_LTGT flag is set then the result be wrapped in
+if the C<PERL_PV_PRETTY_LTGT> flag is set then the result be wrapped in
 angle brackets. 
 
-If the PERL_PV_PRETTY_ELLIPSES flag is set and not all characters in
+If the C<PERL_PV_PRETTY_ELLIPSES> flag is set and not all characters in
 string were output then an ellipsis C<...> will be appended to the
 string.  Note that this happens AFTER it has been quoted.
 
-If start_color is non-null then it will be inserted after the opening
-quote (if there is one) but before the escaped text.  If end_color
+If C<start_color> is non-null then it will be inserted after the opening
+quote (if there is one) but before the escaped text.  If C<end_color>
 is non-null then it will be inserted after the escaped text but before
 any quotes or ellipses.
 
-Returns a pointer to the prettified text as held by dsv.
+Returns a pointer to the prettified text as held by C<dsv>.
 
 =cut           
 */
@@ -270,36 +275,51 @@ Perl_pv_pretty( pTHX_ SV *dsv, char const * const str, const STRLEN count,
   const STRLEN max, char const * const start_color, char const * const end_color, 
   const U32 flags ) 
 {
-    const U8 dq = (flags & PERL_PV_PRETTY_QUOTE) ? '"' : '%';
+    const U8 *quotes = (U8*)((flags & PERL_PV_PRETTY_QUOTE) ? "\"\"" :
+                             (flags & PERL_PV_PRETTY_LTGT)  ? "<>" : NULL);
     STRLEN escaped;
+    STRLEN max_adjust= 0;
+    STRLEN orig_cur;
  
     PERL_ARGS_ASSERT_PV_PRETTY;
    
     if (!(flags & PERL_PV_PRETTY_NOCLEAR)) {
-           /* This won't alter the UTF-8 flag */
-           sv_setpvs(dsv, "");
+        /* This won't alter the UTF-8 flag */
+        SvPVCLEAR(dsv);
     }
+    orig_cur= SvCUR(dsv);
 
-    if ( dq == '"' )
-        sv_catpvs(dsv, "\"");
-    else if ( flags & PERL_PV_PRETTY_LTGT )
-        sv_catpvs(dsv, "<");
+    if ( quotes )
+        Perl_sv_catpvf(aTHX_ dsv, "%c", quotes[0]);
         
     if ( start_color != NULL ) 
         sv_catpv(dsv, start_color);
-    
-    pv_escape( dsv, str, count, max, &escaped, flags | PERL_PV_ESCAPE_NOCLEAR );    
-    
+
+    if ((flags & PERL_PV_PRETTY_EXACTSIZE)) {
+        if (quotes)
+            max_adjust += 2;
+        assert(max > max_adjust);
+        pv_escape( NULL, str, count, max - max_adjust, &escaped, flags );
+        if ( (flags & PERL_PV_PRETTY_ELLIPSES) && ( escaped < count ) )
+            max_adjust += 3;
+        assert(max > max_adjust);
+    }
+
+    pv_escape( dsv, str, count, max - max_adjust, &escaped, flags | PERL_PV_ESCAPE_NOCLEAR );
+
     if ( end_color != NULL ) 
         sv_catpv(dsv, end_color);
 
-    if ( dq == '"' ) 
-       sv_catpvs( dsv, "\"");
-    else if ( flags & PERL_PV_PRETTY_LTGT )
-        sv_catpvs(dsv, ">");         
+    if ( quotes )
+        Perl_sv_catpvf(aTHX_ dsv, "%c", quotes[1]);
     
     if ( (flags & PERL_PV_PRETTY_ELLIPSES) && ( escaped < count ) )
            sv_catpvs(dsv, "...");
+
+    if ((flags & PERL_PV_PRETTY_EXACTSIZE)) {
+        while( SvCUR(dsv) - orig_cur < max )
+            sv_catpvs(dsv," ");
+    }
  
     return SvPVX(dsv);
 }
@@ -338,7 +358,7 @@ Perl_sv_peek(pTHX_ SV *sv)
     int unref = 0;
     U32 type;
 
-    sv_setpvs(t, "");
+    SvPVCLEAR(t);
   retry:
     if (!sv) {
        sv_catpv(t, "VOID");
@@ -401,11 +421,14 @@ Perl_sv_peek(pTHX_ SV *sv)
                break;
            }
        }
-       if (SvREFCNT(sv) > 1)
-           Perl_sv_catpvf(aTHX_ t, "<%"UVuf"%s>", (UV)SvREFCNT(sv),
-                   is_tmp ? "T" : "");
-       else if (is_tmp)
-           sv_catpv(t, "<T>");
+       if (is_tmp || SvREFCNT(sv) > 1) {
+            Perl_sv_catpvf(aTHX_ t, "<");
+            if (SvREFCNT(sv) > 1)
+                Perl_sv_catpvf(aTHX_ t, "%" UVuf, (UV)SvREFCNT(sv));
+            if (is_tmp)
+                Perl_sv_catpvf(aTHX_ t, "%s", SvTEMP(t) ? "T" : "t");
+            Perl_sv_catpvf(aTHX_ t, ">");
+        }
     }
 
     if (SvROK(sv)) {
@@ -457,15 +480,15 @@ Perl_sv_peek(pTHX_ SV *sv)
        }
     }
     else if (SvNOKp(sv)) {
-       STORE_NUMERIC_LOCAL_SET_STANDARD();
-       Perl_sv_catpvf(aTHX_ t, "(%"NVgf")",SvNVX(sv));
-       RESTORE_NUMERIC_LOCAL();
+       STORE_LC_NUMERIC_UNDERLYING_SET_STANDARD();
+       Perl_sv_catpvf(aTHX_ t, "(%" NVgf ")",SvNVX(sv));
+       RESTORE_LC_NUMERIC_UNDERLYING();
     }
     else if (SvIOKp(sv)) {
        if (SvIsUV(sv))
-           Perl_sv_catpvf(aTHX_ t, "(%"UVuf")", (UV)SvUVX(sv));
+           Perl_sv_catpvf(aTHX_ t, "(%" UVuf ")", (UV)SvUVX(sv));
        else
-            Perl_sv_catpvf(aTHX_ t, "(%"IVdf")", (IV)SvIVX(sv));
+            Perl_sv_catpvf(aTHX_ t, "(%" IVdf ")", (IV)SvIVX(sv));
     }
     else
        sv_catpv(t, "()");
@@ -552,7 +575,10 @@ Perl_dump_packsubs_perl(pTHX_ const HV *stash, bool justperl)
     for (i = 0; i <= (I32) HvMAX(stash); i++) {
         const HE *entry;
        for (entry = HvARRAY(stash)[i]; entry; entry = HeNEXT(entry)) {
-           const GV * const gv = (const GV *)HeVAL(entry);
+           GV * gv = (GV *)HeVAL(entry);
+            if (SvROK(gv) && SvTYPE(SvRV(gv)) == SVt_PVCV)
+                /* unfake a fake GV */
+                (void)CvGV(SvRV(gv));
            if (SvTYPE(gv) != SVt_PVGV || !GvGP(gv))
                continue;
            if (GvCVu(gv))
@@ -594,7 +620,7 @@ Perl_dump_sub_perl(pTHX_ const GV *gv, bool justperl)
     Perl_dump_indent(aTHX_ 0, Perl_debug_log, "\nSUB %s = ",
                      generic_pv_escape(tmpsv, name, len, SvUTF8(sv)));
     if (CvISXSUB(GvCV(gv)))
-       Perl_dump_indent(aTHX_ 0, Perl_debug_log, "(xsub 0x%"UVxf" %d)\n",
+       Perl_dump_indent(aTHX_ 0, Perl_debug_log, "(xsub 0x%" UVxf " %d)\n",
            PTR2UV(CvXSUB(GvCV(gv))),
            (int)CvXSUBANY(GvCV(gv)).any_i32);
     else if (CvROOT(GvCV(gv)))
@@ -631,33 +657,35 @@ Perl_do_pmop_dump(pTHX_ I32 level, PerlIO *file, const PMOP *pm)
 
     PERL_ARGS_ASSERT_DO_PMOP_DUMP;
 
-    if (!pm) {
-       Perl_dump_indent(aTHX_ level, file, "{}\n");
+    if (!pm)
        return;
-    }
-    Perl_dump_indent(aTHX_ level, file, "{\n");
-    level++;
     if (pm->op_pmflags & PMf_ONCE)
        ch = '?';
     else
        ch = '/';
     if (PM_GETRE(pm))
-       Perl_dump_indent(aTHX_ level, file, "PMf_PRE %c%s%c%s\n",
-            ch, RX_PRECOMP(PM_GETRE(pm)), ch,
-            (pm->op_private & OPpRUNTIME) ? " (RUNTIME)" : "");
+       Perl_dump_indent(aTHX_ level, file, "PMf_PRE %c%.*s%c\n",
+            ch,(int)RX_PRELEN(PM_GETRE(pm)), RX_PRECOMP(PM_GETRE(pm)), ch);
     else
        Perl_dump_indent(aTHX_ level, file, "PMf_PRE (RUNTIME)\n");
-    if (pm->op_type != OP_PUSHRE && pm->op_pmreplrootu.op_pmreplroot) {
-       Perl_dump_indent(aTHX_ level, file, "PMf_REPL = ");
-       op_dump(pm->op_pmreplrootu.op_pmreplroot);
+
+    if (pm->op_type == OP_SPLIT)
+        Perl_dump_indent(aTHX_ level, file, "TARGOFF/GV = 0x%" UVxf "\n",
+                PTR2UV(pm->op_pmreplrootu.op_pmtargetgv));
+    else {
+        if (pm->op_pmreplrootu.op_pmreplroot) {
+            Perl_dump_indent(aTHX_ level, file, "PMf_REPL = ");
+            op_dump(pm->op_pmreplrootu.op_pmreplroot);
+        }
     }
+
     if (pm->op_code_list) {
        if (pm->op_pmflags & PMf_CODELIST_PRIVATE) {
            Perl_dump_indent(aTHX_ level, file, "CODE_LIST =\n");
            do_op_dump(level, file, pm->op_code_list);
        }
        else
-           Perl_dump_indent(aTHX_ level, file, "CODE_LIST = 0x%"UVxf"\n",
+           Perl_dump_indent(aTHX_ level, file, "CODE_LIST = 0x%" UVxf "\n",
                                    PTR2UV(pm->op_code_list));
     }
     if (pm->op_pmflags || (PM_GETRE(pm) && RX_CHECK_SUBSTR(PM_GETRE(pm)))) {
@@ -665,8 +693,6 @@ Perl_do_pmop_dump(pTHX_ I32 level, PerlIO *file, const PMOP *pm)
        Perl_dump_indent(aTHX_ level, file, "PMFLAGS = (%s)\n", SvCUR(tmpsv) ? SvPVX_const(tmpsv) + 1 : "");
        SvREFCNT_dec_NN(tmpsv);
     }
-
-    Perl_dump_indent(aTHX_ level-1, file, "}\n");
 }
 
 const struct flag_to_name pmflags_flags_names[] = {
@@ -777,7 +803,7 @@ Perl_do_op_dump(pTHX_ I32 level, PerlIO *file, const OP *o)
     level++;
     seq = sequence_num(o);
     if (seq)
-       PerlIO_printf(file, "%-4"UVuf, seq);
+       PerlIO_printf(file, "%-4" UVuf, seq);
     else
        PerlIO_printf(file, "????");
     PerlIO_printf(file,
@@ -785,43 +811,20 @@ Perl_do_op_dump(pTHX_ I32 level, PerlIO *file, const OP *o)
                  (int)(PL_dumpindent*level-4), "", OP_NAME(o));
     if (o->op_next)
        PerlIO_printf(file,
-                       o->op_type == OP_NULL ? "(%"UVuf")\n" : "%"UVuf"\n",
+                       o->op_type == OP_NULL ? "(%" UVuf ")\n" : "%" UVuf "\n",
                                sequence_num(o->op_next));
     else
        PerlIO_printf(file, "NULL\n");
     if (o->op_targ) {
        if (optype == OP_NULL) {
            Perl_dump_indent(aTHX_ level, file, "  (was %s)\n", PL_op_name[o->op_targ]);
-           if (o->op_targ == OP_NEXTSTATE) {
-               if (CopLINE(cCOPo))
-                   Perl_dump_indent(aTHX_ level, file, "LINE = %"UVuf"\n",
-                                    (UV)CopLINE(cCOPo));
-        if (CopSTASHPV(cCOPo)) {
-            SV* tmpsv = newSVpvs_flags("", SVs_TEMP);
-            HV *stash = CopSTASH(cCOPo);
-            const char * const hvname = HvNAME_get(stash);
-
-                   Perl_dump_indent(aTHX_ level, file, "PACKAGE = \"%s\"\n",
-                           generic_pv_escape( tmpsv, hvname, HvNAMELEN(stash), HvNAMEUTF8(stash)));
-       }
-     if (CopLABEL(cCOPo)) {
-          SV* tmpsv = newSVpvs_flags("", SVs_TEMP);
-          STRLEN label_len;
-          U32 label_flags;
-          const char *label = CopLABEL_len_flags(cCOPo,
-                                                 &label_len,
-                                                 &label_flags);
-                   Perl_dump_indent(aTHX_ level, file, "LABEL = \"%s\"\n",
-                           generic_pv_escape( tmpsv, label, label_len,(label_flags & SVf_UTF8)));
-      }
-
-           }
        }
        else
            Perl_dump_indent(aTHX_ level, file, "TARG = %ld\n", (long)o->op_targ);
     }
 #ifdef DUMPADDR
-    Perl_dump_indent(aTHX_ level, file, "ADDR = 0x%"UVxf" => 0x%"UVxf"\n", (UV)o, (UV)o->op_next);
+    Perl_dump_indent(aTHX_ level, file, "ADDR = 0x%" UVxf " => 0x%" UVxf "\n",
+                                        (UV)o, (UV)o->op_next);
 #endif
 
     if (o->op_flags || o->op_slabbed || o->op_savefree || o->op_static) {
@@ -845,7 +848,7 @@ Perl_do_op_dump(pTHX_ I32 level, PerlIO *file, const OP *o)
         if (o->op_savefree) sv_catpvs(tmpsv, ",SAVEFREE");
         if (o->op_static)   sv_catpvs(tmpsv, ",STATIC");
         if (o->op_folded)   sv_catpvs(tmpsv, ",FOLDED");
-        if (o->op_lastsib)  sv_catpvs(tmpsv, ",LASTSIB");
+        if (o->op_moresib)  sv_catpvs(tmpsv, ",MORESIB");
         Perl_dump_indent(aTHX_ level, file, "FLAGS = (%s)\n",
                          SvCUR(tmpsv) ? SvPVX_const(tmpsv) + 1 : "");
     }
@@ -906,7 +909,10 @@ Perl_do_op_dump(pTHX_ I32 level, PerlIO *file, const OP *o)
                         sv_catpv(tmpsv, &PL_op_private_labels[label]);
                         sv_catpv(tmpsv, "=");
                     }
-                    sv_catpv(tmpsv, &PL_op_private_labels[enum_label]);
+                    if (enum_label == -1)
+                        Perl_sv_catpvf(aTHX_ tmpsv, "0x%" UVxf, (UV)val);
+                    else
+                        sv_catpv(tmpsv, &PL_op_private_labels[enum_label]);
 
                 }
                 else {
@@ -923,14 +929,14 @@ Perl_do_op_dump(pTHX_ I32 level, PerlIO *file, const OP *o)
             }
             if (oppriv) {
                 sv_catpv(tmpsv, ",");
-                Perl_sv_catpvf(aTHX_ tmpsv, "0x%"UVxf, (UV)oppriv);
+                Perl_sv_catpvf(aTHX_ tmpsv, "0x%" UVxf, (UV)oppriv);
             }
         }
        if (tmpsv && SvCUR(tmpsv)) {
             Perl_dump_indent(aTHX_ level, file, "PRIVATE = (%s)\n", SvPVX_const(tmpsv) + 1);
        } else
-            Perl_dump_indent(aTHX_ level, file, "PRIVATE = (0x%"UVxf")\n",
-                             (UV)oppriv);
+            Perl_dump_indent(aTHX_ level, file, "PRIVATE = (0x%" UVxf ")\n",
+                                   (UV)oppriv);
     }
 
     switch (optype) {
@@ -956,19 +962,39 @@ Perl_do_op_dump(pTHX_ I32 level, PerlIO *file, const OP *o)
        }
 #endif
        break;
+
+    case OP_MULTIDEREF:
+    {
+        UNOP_AUX_item *items = cUNOP_AUXo->op_aux;
+        UV i, count = items[-1].uv;
+
+       Perl_dump_indent(aTHX_ level, file, "ARGS = \n");
+        for (i=0; i < count;  i++)
+            Perl_dump_indent(aTHX_ level+1, file, "%" UVuf " => 0x%" UVxf "\n",
+                                    i, items[i].uv);
+       break;
+    }
+
     case OP_CONST:
     case OP_HINTSEVAL:
     case OP_METHOD_NAMED:
+    case OP_METHOD_SUPER:
+    case OP_METHOD_REDIR:
+    case OP_METHOD_REDIR_SUPER:
 #ifndef USE_ITHREADS
        /* with ITHREADS, consts are stored in the pad, and the right pad
         * may not be active here, so skip */
-       Perl_dump_indent(aTHX_ level, file, "SV = %s\n", SvPEEK(cSVOPo_sv));
+       Perl_dump_indent(aTHX_ level, file, "SV = %s\n", SvPEEK(cMETHOPx_meth(o)));
 #endif
        break;
+    case OP_NULL:
+       if (o->op_targ != OP_NEXTSTATE && o->op_targ != OP_DBSTATE)
+           break;
+       /* FALLTHROUGH */
     case OP_NEXTSTATE:
     case OP_DBSTATE:
        if (CopLINE(cCOPo))
-           Perl_dump_indent(aTHX_ level, file, "LINE = %"UVuf"\n",
+           Perl_dump_indent(aTHX_ level, file, "LINE = %" UVuf "\n",
                             (UV)CopLINE(cCOPo));
     if (CopSTASHPV(cCOPo)) {
         SV* tmpsv = newSVpvs_flags("", SVs_TEMP);
@@ -989,21 +1015,23 @@ Perl_do_op_dump(pTHX_ I32 level, PerlIO *file, const OP *o)
                            generic_pv_escape( tmpsv, label, label_len,
                                       (label_flags & SVf_UTF8)));
    }
+        Perl_dump_indent(aTHX_ level, file, "SEQ = %u\n",
+                         (unsigned int)cCOPo->cop_seq);
        break;
     case OP_ENTERLOOP:
        Perl_dump_indent(aTHX_ level, file, "REDO ===> ");
        if (cLOOPo->op_redoop)
-           PerlIO_printf(file, "%"UVuf"\n", sequence_num(cLOOPo->op_redoop));
+           PerlIO_printf(file, "%" UVuf "\n", sequence_num(cLOOPo->op_redoop));
        else
            PerlIO_printf(file, "DONE\n");
        Perl_dump_indent(aTHX_ level, file, "NEXT ===> ");
        if (cLOOPo->op_nextop)
-           PerlIO_printf(file, "%"UVuf"\n", sequence_num(cLOOPo->op_nextop));
+           PerlIO_printf(file, "%" UVuf "\n", sequence_num(cLOOPo->op_nextop));
        else
            PerlIO_printf(file, "DONE\n");
        Perl_dump_indent(aTHX_ level, file, "LAST ===> ");
        if (cLOOPo->op_lastop)
-           PerlIO_printf(file, "%"UVuf"\n", sequence_num(cLOOPo->op_lastop));
+           PerlIO_printf(file, "%" UVuf "\n", sequence_num(cLOOPo->op_lastop));
        else
            PerlIO_printf(file, "DONE\n");
        break;
@@ -1015,11 +1043,11 @@ Perl_do_op_dump(pTHX_ I32 level, PerlIO *file, const OP *o)
     case OP_AND:
        Perl_dump_indent(aTHX_ level, file, "OTHER ===> ");
        if (cLOGOPo->op_other)
-           PerlIO_printf(file, "%"UVuf"\n", sequence_num(cLOGOPo->op_other));
+           PerlIO_printf(file, "%" UVuf "\n", sequence_num(cLOGOPo->op_other));
        else
            PerlIO_printf(file, "DONE\n");
        break;
-    case OP_PUSHRE:
+    case OP_SPLIT:
     case OP_MATCH:
     case OP_QR:
     case OP_SUBST:
@@ -1032,14 +1060,14 @@ Perl_do_op_dump(pTHX_ I32 level, PerlIO *file, const OP *o)
     case OP_LEAVEWRITE:
     case OP_SCOPE:
        if (o->op_private & OPpREFCOUNTED)
-           Perl_dump_indent(aTHX_ level, file, "REFCNT = %"UVuf"\n", (UV)o->op_targ);
+           Perl_dump_indent(aTHX_ level, file, "REFCNT = %" UVuf "\n", (UV)o->op_targ);
        break;
     default:
        break;
     }
     if (o->op_flags & OPf_KIDS) {
        OP *kid;
-       for (kid = cUNOPo->op_first; kid; kid = OP_SIBLING(kid))
+       for (kid = cUNOPo->op_first; kid; kid = OpSIBLING(kid))
            do_op_dump(level, file, kid);
     }
     Perl_dump_indent(aTHX_ level-1, file, "}\n");
@@ -1067,9 +1095,6 @@ Perl_gv_dump(pTHX_ GV *gv)
     const char* name;
     SV *sv, *tmp = newSVpvs_flags("", SVs_TEMP);
 
-
-    PERL_ARGS_ASSERT_GV_DUMP;
-
     if (!gv) {
        PerlIO_printf(Perl_debug_log, "{}\n");
        return;
@@ -1086,7 +1111,7 @@ Perl_gv_dump(pTHX_ GV *gv)
         Perl_dump_indent(aTHX_ 1, Perl_debug_log, "-> %s",
                      generic_pv_escape( tmp, name, len, SvUTF8(sv) ));
     }
-    PerlIO_putc(Perl_debug_log, '\n');
+    (void)PerlIO_putc(Perl_debug_log, '\n');
     Perl_dump_indent(aTHX_ 0, Perl_debug_log, "}\n");
 }
 
@@ -1096,7 +1121,7 @@ Perl_gv_dump(pTHX_ GV *gv)
  */
 
 static const struct { const char type; const char *name; } magic_names[] = {
-#include "mg_names.c"
+#include "mg_names.inc"
        /* this null string terminates the list */
        { 0,                         NULL },
 };
@@ -1108,7 +1133,7 @@ Perl_do_magic_dump(pTHX_ I32 level, PerlIO *file, const MAGIC *mg, I32 nest, I32
 
     for (; mg; mg = mg->mg_moremagic) {
        Perl_dump_indent(aTHX_ level, file,
-                        "  MAGIC = 0x%"UVxf"\n", PTR2UV(mg));
+                        "  MAGIC = 0x%" UVxf "\n", PTR2UV(mg));
        if (mg->mg_virtual) {
             const MGVTBL * const v = mg->mg_virtual;
            if (v >= PL_magic_vtables
@@ -1117,7 +1142,8 @@ Perl_do_magic_dump(pTHX_ I32 level, PerlIO *file, const MAGIC *mg, I32 nest, I32
                Perl_dump_indent(aTHX_ level, file, "    MG_VIRTUAL = &PL_vtbl_%s\n", PL_magic_vtable_names[i]);
            }
            else
-               Perl_dump_indent(aTHX_ level, file, "    MG_VIRTUAL = 0x%"UVxf"\n", PTR2UV(v));
+               Perl_dump_indent(aTHX_ level, file, "    MG_VIRTUAL = 0x%"
+                                       UVxf "\n", PTR2UV(v));
         }
        else
            Perl_dump_indent(aTHX_ level, file, "    MG_VIRTUAL = 0\n");
@@ -1165,7 +1191,7 @@ Perl_do_magic_dump(pTHX_ I32 level, PerlIO *file, const MAGIC *mg, I32 nest, I32
                Perl_dump_indent(aTHX_ level, file, "      BYTES\n");
         }
        if (mg->mg_obj) {
-           Perl_dump_indent(aTHX_ level, file, "    MG_OBJ = 0x%"UVxf"\n",
+           Perl_dump_indent(aTHX_ level, file, "    MG_OBJ = 0x%" UVxf "\n",
                PTR2UV(mg->mg_obj));
             if (mg->mg_type == PERL_MAGIC_qr) {
                REGEXP* const re = (REGEXP *)mg->mg_obj;
@@ -1177,7 +1203,7 @@ Perl_do_magic_dump(pTHX_ I32 level, PerlIO *file, const MAGIC *mg, I32 nest, I32
                     (RX_UTF8(re) ? PERL_PV_ESCAPE_UNI : 0))
                 );
                Perl_dump_indent(aTHX_ level+1, file, "    PAT = %s\n", s);
-               Perl_dump_indent(aTHX_ level+1, file, "    REFCNT = %"IVdf"\n",
+               Perl_dump_indent(aTHX_ level+1, file, "    REFCNT = %" IVdf "\n",
                        (IV)RX_REFCNT(re));
             }
             if (mg->mg_flags & MGf_REFCOUNTED)
@@ -1186,7 +1212,7 @@ Perl_do_magic_dump(pTHX_ I32 level, PerlIO *file, const MAGIC *mg, I32 nest, I32
         if (mg->mg_len)
            Perl_dump_indent(aTHX_ level, file, "    MG_LEN = %ld\n", (long)mg->mg_len);
         if (mg->mg_ptr) {
-           Perl_dump_indent(aTHX_ level, file, "    MG_PTR = 0x%"UVxf, PTR2UV(mg->mg_ptr));
+           Perl_dump_indent(aTHX_ level, file, "    MG_PTR = 0x%" UVxf, PTR2UV(mg->mg_ptr));
            if (mg->mg_len >= 0) {
                if (mg->mg_type != PERL_MAGIC_utf8) {
                    SV * const sv = newSVpvs("");
@@ -1207,7 +1233,7 @@ Perl_do_magic_dump(pTHX_ I32 level, PerlIO *file, const MAGIC *mg, I32 nest, I32
                 " ???? - " __FILE__
                 " does not know how to handle this MG_LEN"
                );
-            PerlIO_putc(file, '\n');
+            (void)PerlIO_putc(file, '\n');
         }
        if (mg->mg_type == PERL_MAGIC_utf8) {
            const STRLEN * const cache = (STRLEN *) mg->mg_ptr;
@@ -1215,7 +1241,7 @@ Perl_do_magic_dump(pTHX_ I32 level, PerlIO *file, const MAGIC *mg, I32 nest, I32
                IV i;
                for (i = 0; i < PERL_MAGIC_UTF8_CACHESIZE; i++)
                    Perl_dump_indent(aTHX_ level, file,
-                                    "      %2"IVdf": %"UVuf" -> %"UVuf"\n",
+                                    "      %2" IVdf ": %" UVuf " -> %" UVuf "\n",
                                     i,
                                     (UV)cache[i * 2],
                                     (UV)cache[i * 2 + 1]);
@@ -1237,7 +1263,7 @@ Perl_do_hv_dump(pTHX_ I32 level, PerlIO *file, const char *name, HV *sv)
 
     PERL_ARGS_ASSERT_DO_HV_DUMP;
 
-    Perl_dump_indent(aTHX_ level, file, "%s = 0x%"UVxf, name, PTR2UV(sv));
+    Perl_dump_indent(aTHX_ level, file, "%s = 0x%" UVxf, name, PTR2UV(sv));
     if (sv && (hvname = HvNAME_get(sv)))
     {
        /* we have to use pv_display and HvNAMELEN_get() so that we display the real package
@@ -1250,7 +1276,7 @@ Perl_do_hv_dump(pTHX_ I32 level, PerlIO *file, const char *name, HV *sv)
                                    HvNAMELEN(sv), HvNAMEUTF8(sv)));
     }
     else
-       PerlIO_putc(file, '\n');
+        (void)PerlIO_putc(file, '\n');
 }
 
 void
@@ -1258,14 +1284,14 @@ Perl_do_gv_dump(pTHX_ I32 level, PerlIO *file, const char *name, GV *sv)
 {
     PERL_ARGS_ASSERT_DO_GV_DUMP;
 
-    Perl_dump_indent(aTHX_ level, file, "%s = 0x%"UVxf, name, PTR2UV(sv));
+    Perl_dump_indent(aTHX_ level, file, "%s = 0x%" UVxf, name, PTR2UV(sv));
     if (sv && GvNAME(sv)) {
         SV * const tmpsv = newSVpvs("");
         PerlIO_printf(file, "\t\"%s\"\n",
                               generic_pv_escape( tmpsv, GvNAME(sv), GvNAMELEN(sv), GvNAMEUTF8(sv) ));
     }
     else
-       PerlIO_putc(file, '\n');
+        (void)PerlIO_putc(file, '\n');
 }
 
 void
@@ -1273,7 +1299,7 @@ Perl_do_gvgv_dump(pTHX_ I32 level, PerlIO *file, const char *name, GV *sv)
 {
     PERL_ARGS_ASSERT_DO_GVGV_DUMP;
 
-    Perl_dump_indent(aTHX_ level, file, "%s = 0x%"UVxf, name, PTR2UV(sv));
+    Perl_dump_indent(aTHX_ level, file, "%s = 0x%" UVxf, name, PTR2UV(sv));
     if (sv && GvNAME(sv)) {
        SV *tmp = newSVpvs_flags("", SVs_TEMP);
        const char *hvname;
@@ -1289,7 +1315,7 @@ Perl_do_gvgv_dump(pTHX_ I32 level, PerlIO *file, const char *name, GV *sv)
                               generic_pv_escape( tmp, GvNAME(sv), GvNAMELEN(sv), GvNAMEUTF8(sv)));
     }
     else
-       PerlIO_putc(file, '\n');
+        (void)PerlIO_putc(file, '\n');
 }
 
 const struct flag_to_name first_sv_flags_names[] = {
@@ -1307,9 +1333,8 @@ const struct flag_to_name second_sv_flags_names[] = {
     {SVf_OOK, "OOK,"},
     {SVf_FAKE, "FAKE,"},
     {SVf_READONLY, "READONLY,"},
-    {SVf_IsCOW, "IsCOW,"},
+    {SVf_PROTECT, "PROTECT,"},
     {SVf_BREAK, "BREAK,"},
-    {SVf_AMAGIC, "OVERLOAD,"},
     {SVp_IOK, "pIOK,"},
     {SVp_NOK, "pNOK,"},
     {SVp_POK, "pPOK,"}
@@ -1328,9 +1353,10 @@ const struct flag_to_name cv_flags_names[] = {
     {CVf_CVGV_RC, "CVGV_RC,"},
     {CVf_DYNFILE, "DYNFILE,"},
     {CVf_AUTOLOAD, "AUTOLOAD,"},
-    {CVf_HASEVAL, "HASEVAL"},
+    {CVf_HASEVAL, "HASEVAL,"},
     {CVf_SLABBED, "SLABBED,"},
     {CVf_NAMED, "NAMED,"},
+    {CVf_LEXICAL, "LEXICAL,"},
     {CVf_ISXSUB, "ISXSUB,"}
 };
 
@@ -1338,6 +1364,7 @@ const struct flag_to_name hv_flags_names[] = {
     {SVphv_SHAREKEYS, "SHAREKEYS,"},
     {SVphv_LAZYDEL, "LAZYDEL,"},
     {SVphv_HASKFLAGS, "HASKFLAGS,"},
+    {SVf_AMAGIC, "OVERLOAD,"},
     {SVphv_CLONEABLE, "CLONEABLE,"}
 };
 
@@ -1345,7 +1372,6 @@ const struct flag_to_name gp_flags_names[] = {
     {GVf_INTRO, "INTRO,"},
     {GVf_MULTI, "MULTI,"},
     {GVf_ASSUMECV, "ASSUMECV,"},
-    {GVf_IN_PAD, "IN_PAD,"}
 };
 
 const struct flag_to_name gp_flags_imported_names[] = {
@@ -1363,7 +1389,9 @@ const struct flag_to_name regexp_extflags_names[] = {
     {RXf_PMf_SINGLELINE,  "PMf_SINGLELINE,"},
     {RXf_PMf_FOLD,        "PMf_FOLD,"},
     {RXf_PMf_EXTENDED,    "PMf_EXTENDED,"},
+    {RXf_PMf_EXTENDED_MORE, "PMf_EXTENDED_MORE,"},
     {RXf_PMf_KEEPCOPY,    "PMf_KEEPCOPY,"},
+    {RXf_PMf_NOCAPTURE,   "PMf_NOCAPURE,"},
     {RXf_IS_ANCHORED,     "IS_ANCHORED,"},
     {RXf_NO_INPLACE_SUBST, "NO_INPLACE_SUBST,"},
     {RXf_EVAL_SEEN,       "EVAL_SEEN,"},
@@ -1393,15 +1421,23 @@ const struct flag_to_name regexp_core_intflags_names[] = {
     {PREGf_CUTGROUP_SEEN,   "CUTGROUP_SEEN,"},
     {PREGf_USE_RE_EVAL,     "USE_RE_EVAL,"},
     {PREGf_NOSCAN,          "NOSCAN,"},
-    {PREGf_CANY_SEEN,       "CANY_SEEN,"},
     {PREGf_GPOS_SEEN,       "GPOS_SEEN,"},
     {PREGf_GPOS_FLOAT,      "GPOS_FLOAT,"},
-    {PREGf_ANCH_BOL,        "ANCH_BOL,"},
     {PREGf_ANCH_MBOL,       "ANCH_MBOL,"},
     {PREGf_ANCH_SBOL,       "ANCH_SBOL,"},
     {PREGf_ANCH_GPOS,       "ANCH_GPOS,"},
 };
 
+/* Perl_do_sv_dump():
+ *
+ * level:   amount to indent the output
+ * sv:      the object to dump
+ * nest:    the current level of recursion
+ * maxnest: the maximum allowed level of recursion
+ * dumpops: if true, also dump the ops associated with a CV
+ * pvlim:   limit on the length of any strings that are output
+ * */
+
 void
 Perl_do_sv_dump(pTHX_ I32 level, PerlIO *file, SV *sv, I32 nest, I32 maxnest, bool dumpops, STRLEN pvlim)
 {
@@ -1423,26 +1459,21 @@ Perl_do_sv_dump(pTHX_ I32 level, PerlIO *file, SV *sv, I32 nest, I32 maxnest, bo
     /* process general SV flags */
 
     d = Perl_newSVpvf(aTHX_
-                  "(0x%"UVxf") at 0x%"UVxf"\n%*s  REFCNT = %"IVdf"\n%*s  FLAGS = (",
+                  "(0x%" UVxf ") at 0x%" UVxf "\n%*s  REFCNT = %" IVdf "\n%*s  FLAGS = (",
                   PTR2UV(SvANY(sv)), PTR2UV(sv),
                   (int)(PL_dumpindent*level), "", (IV)SvREFCNT(sv),
                   (int)(PL_dumpindent*level), "");
 
-    if (!((flags & SVpad_NAME) == SVpad_NAME
-         && (type == SVt_PVMG || type == SVt_PVNV))) {
-       if ((flags & SVs_PADMY) && (flags & SVs_PADSTALE))
+    if ((flags & SVs_PADSTALE))
            sv_catpv(d, "PADSTALE,");
-    }
-    if (!((flags & SVpad_NAME) == SVpad_NAME && type == SVt_PVMG)) {
-       if (!(flags & SVs_PADMY) && (flags & SVs_PADTMP))
+    if ((flags & SVs_PADTMP))
            sv_catpv(d, "PADTMP,");
-       if (flags & SVs_PADMY)  sv_catpv(d, "PADMY,");
-    }
     append_flags(d, flags, first_sv_flags_names);
     if (flags & SVf_ROK)  {    
                                sv_catpv(d, "ROK,");
        if (SvWEAKREF(sv))      sv_catpv(d, "WEAKREF,");
     }
+    if (flags & SVf_IsCOW && type != SVt_PVHV) sv_catpvs(d, "IsCOW,");
     append_flags(d, flags, second_sv_flags_names);
     if (flags & SVp_SCREAM && type != SVt_PVHV && !isGV_with_GP(sv)
                           && type != SVt_PVAV) {
@@ -1478,22 +1509,12 @@ Perl_do_sv_dump(pTHX_ I32 level, PerlIO *file, SV *sv, I32 nest, I32 maxnest, bo
            }
        }
        /* FALLTHROUGH */
+    case SVt_PVMG:
     default:
-    evaled_or_uv:
-       if (SvEVALED(sv))       sv_catpv(d, "EVALED,");
        if (SvIsUV(sv) && !(flags & SVf_ROK))   sv_catpv(d, "IsUV,");
        break;
-    case SVt_PVMG:
-       if (SvTAIL(sv))         sv_catpv(d, "TAIL,");
-       if (SvVALID(sv))        sv_catpv(d, "VALID,");
-       if (SvPAD_TYPED(sv))    sv_catpv(d, "TYPED,");
-       if (SvPAD_OUR(sv))      sv_catpv(d, "OUR,");
-       /* FALLTHROUGH */
-    case SVt_PVNV:
-       if (SvPAD_STATE(sv))    sv_catpv(d, "STATE,");
-       goto evaled_or_uv;
+
     case SVt_PVAV:
-       if (AvPAD_NAMELIST(sv)) sv_catpvs(d, "NAMELIST,");
        break;
     }
     /* SVphv_SHAREKEYS is also 0x20000000 */
@@ -1511,7 +1532,7 @@ Perl_do_sv_dump(pTHX_ I32 level, PerlIO *file, SV *sv, I32 nest, I32 maxnest, bo
 
 #ifdef DEBUG_LEAKING_SCALARS
     Perl_dump_indent(aTHX_ level, file,
-       "ALLOCATED at %s:%d %s %s (parent 0x%"UVxf"); serial %"UVuf"\n",
+       "ALLOCATED at %s:%d %s %s (parent 0x%" UVxf "); serial %" UVuf "\n",
        sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
        sv->sv_debug_line,
        sv->sv_debug_inpad ? "for" : "by",
@@ -1532,7 +1553,7 @@ Perl_do_sv_dump(pTHX_ I32 level, PerlIO *file, SV *sv, I32 nest, I32 maxnest, bo
            return;
        }
     } else {
-       PerlIO_printf(file, "UNKNOWN(0x%"UVxf") %s\n", (UV)type, s);
+       PerlIO_printf(file, "UNKNOWN(0x%" UVxf ") %s\n", (UV)type, s);
        SvREFCNT_dec_NN(d);
        return;
     }
@@ -1544,39 +1565,25 @@ Perl_do_sv_dump(pTHX_ I32 level, PerlIO *file, SV *sv, I32 nest, I32 maxnest, bo
         && type != SVt_REGEXP && !isGV_with_GP(sv) && !SvVALID(sv))
        || (type == SVt_IV && !SvROK(sv))) {
        if (SvIsUV(sv)
-#ifdef PERL_OLD_COPY_ON_WRITE
-                      || SvIsCOW(sv)
-#endif
                                     )
-           Perl_dump_indent(aTHX_ level, file, "  UV = %"UVuf, (UV)SvUVX(sv));
+           Perl_dump_indent(aTHX_ level, file, "  UV = %" UVuf, (UV)SvUVX(sv));
        else
-           Perl_dump_indent(aTHX_ level, file, "  IV = %"IVdf, (IV)SvIVX(sv));
-#ifdef PERL_OLD_COPY_ON_WRITE
-       if (SvIsCOW_shared_hash(sv))
-           PerlIO_printf(file, "  (HASH)");
-       else if (SvIsCOW_normal(sv))
-           PerlIO_printf(file, "  (COW from 0x%"UVxf")", (UV)SvUVX(sv));
-#endif
-       PerlIO_putc(file, '\n');
+           Perl_dump_indent(aTHX_ level, file, "  IV = %" IVdf, (IV)SvIVX(sv));
+       (void)PerlIO_putc(file, '\n');
     }
 
-    if ((type == SVt_PVNV || type == SVt_PVMG)
-       && (SvFLAGS(sv) & SVpad_NAME) == SVpad_NAME) {
-       Perl_dump_indent(aTHX_ level, file, "  COP_LOW = %"UVuf"\n",
-                        (UV) COP_SEQ_RANGE_LOW(sv));
-       Perl_dump_indent(aTHX_ level, file, "  COP_HIGH = %"UVuf"\n",
-                        (UV) COP_SEQ_RANGE_HIGH(sv));
-    } else if ((type >= SVt_PVNV && type != SVt_PVAV && type != SVt_PVHV
+    if ((type >= SVt_PVNV && type != SVt_PVAV && type != SVt_PVHV
                && type != SVt_PVCV && type != SVt_PVFM  && type != SVt_REGEXP
                && type != SVt_PVIO && !isGV_with_GP(sv) && !SvVALID(sv))
               || type == SVt_NV) {
-       STORE_NUMERIC_LOCAL_SET_STANDARD();
+       STORE_LC_NUMERIC_UNDERLYING_SET_STANDARD();
        Perl_dump_indent(aTHX_ level, file, "  NV = %.*" NVgf "\n", NV_DIG, SvNVX(sv));
-       RESTORE_NUMERIC_LOCAL();
+       RESTORE_LC_NUMERIC_UNDERLYING();
     }
 
     if (SvROK(sv)) {
-       Perl_dump_indent(aTHX_ level, file, "  RV = 0x%"UVxf"\n", PTR2UV(SvRV(sv)));
+       Perl_dump_indent(aTHX_ level, file, "  RV = 0x%" UVxf "\n",
+                               PTR2UV(SvRV(sv)));
        if (nest < maxnest)
            do_sv_dump(level+1, file, SvRV(sv), nest+1, maxnest, dumpops, pvlim);
     }
@@ -1595,12 +1602,13 @@ Perl_do_sv_dump(pTHX_ I32 level, PerlIO *file, SV *sv, I32 nest, I32 maxnest, bo
            STRLEN delta;
            if (SvOOK(sv)) {
                SvOOK_offset(sv, delta);
-               Perl_dump_indent(aTHX_ level, file,"  OFFSET = %"UVuf"\n",
+               Perl_dump_indent(aTHX_ level, file,"  OFFSET = %" UVuf "\n",
                                 (UV) delta);
            } else {
                delta = 0;
            }
-           Perl_dump_indent(aTHX_ level, file,"  PV = 0x%"UVxf" ", PTR2UV(ptr));
+           Perl_dump_indent(aTHX_ level, file,"  PV = 0x%" UVxf " ",
+                                   PTR2UV(ptr));
            if (SvOOK(sv)) {
                PerlIO_printf(file, "( %s . ) ",
                              pv_display(d, ptr - delta, delta, 0,
@@ -1621,11 +1629,11 @@ Perl_do_sv_dump(pTHX_ I32 level, PerlIO *file, SV *sv, I32 nest, I32 maxnest, bo
                                                         UNI_DISPLAY_QQ));
                 PerlIO_printf(file, "\n");
             }
-           Perl_dump_indent(aTHX_ level, file, "  CUR = %"IVdf"\n", (IV)SvCUR(sv));
+           Perl_dump_indent(aTHX_ level, file, "  CUR = %" IVdf "\n", (IV)SvCUR(sv));
            if (!re)
-               Perl_dump_indent(aTHX_ level, file, "  LEN = %"IVdf"\n",
+               Perl_dump_indent(aTHX_ level, file, "  LEN = %" IVdf "\n",
                                       (IV)SvLEN(sv));
-#ifdef PERL_NEW_COPY_ON_WRITE
+#ifdef PERL_COPY_ON_WRITE
            if (SvIsCOW(sv) && SvLEN(sv))
                Perl_dump_indent(aTHX_ level, file, "  COW_REFCNT = %d\n",
                                       CowREFCNT(sv));
@@ -1636,22 +1644,14 @@ Perl_do_sv_dump(pTHX_ I32 level, PerlIO *file, SV *sv, I32 nest, I32 maxnest, bo
     }
 
     if (type >= SVt_PVMG) {
-       if (type == SVt_PVMG && SvPAD_OUR(sv)) {
-           HV * const ost = SvOURSTASH(sv);
-           if (ost)
-               do_hv_dump(level, file, "  OURSTASH", ost);
-       } else if (SvTYPE(sv) == SVt_PVAV && AvPAD_NAMELIST(sv)) {
-           Perl_dump_indent(aTHX_ level, file, "  MAXNAMED = %"UVuf"\n",
-                                  (UV)PadnamelistMAXNAMED(sv));
-       } else {
-           if (SvMAGIC(sv))
+       if (SvMAGIC(sv))
                do_magic_dump(level, file, SvMAGIC(sv), nest+1, maxnest, dumpops, pvlim);
-       }
        if (SvSTASH(sv))
            do_hv_dump(level, file, "  STASH", SvSTASH(sv));
 
        if ((type == SVt_PVMG || type == SVt_PVLV) && SvVALID(sv)) {
-           Perl_dump_indent(aTHX_ level, file, "  USEFUL = %"IVdf"\n", (IV)BmUSEFUL(sv));
+           Perl_dump_indent(aTHX_ level, file, "  USEFUL = %" IVdf "\n",
+                                   (IV)BmUSEFUL(sv));
        }
     }
 
@@ -1659,33 +1659,36 @@ Perl_do_sv_dump(pTHX_ I32 level, PerlIO *file, SV *sv, I32 nest, I32 maxnest, bo
 
     switch (type) {
     case SVt_PVAV:
-       Perl_dump_indent(aTHX_ level, file, "  ARRAY = 0x%"UVxf, PTR2UV(AvARRAY(sv)));
+       Perl_dump_indent(aTHX_ level, file, "  ARRAY = 0x%" UVxf,
+                               PTR2UV(AvARRAY(sv)));
        if (AvARRAY(sv) != AvALLOC(sv)) {
-           PerlIO_printf(file, " (offset=%"IVdf")\n", (IV)(AvARRAY(sv) - AvALLOC(sv)));
-           Perl_dump_indent(aTHX_ level, file, "  ALLOC = 0x%"UVxf"\n", PTR2UV(AvALLOC(sv)));
+           PerlIO_printf(file, " (offset=%" IVdf ")\n",
+                                (IV)(AvARRAY(sv) - AvALLOC(sv)));
+           Perl_dump_indent(aTHX_ level, file, "  ALLOC = 0x%" UVxf "\n",
+                                   PTR2UV(AvALLOC(sv)));
        }
        else
-           PerlIO_putc(file, '\n');
-       Perl_dump_indent(aTHX_ level, file, "  FILL = %"IVdf"\n", (IV)AvFILLp(sv));
-       Perl_dump_indent(aTHX_ level, file, "  MAX = %"IVdf"\n", (IV)AvMAX(sv));
-       /* arylen is stored in magic, and padnamelists use SvMAGIC for
-          something else. */
-       if (!AvPAD_NAMELIST(sv))
-           Perl_dump_indent(aTHX_ level, file, "  ARYLEN = 0x%"UVxf"\n",
-                                  SvMAGIC(sv) ? PTR2UV(AvARYLEN(sv)) : 0);
-       sv_setpvs(d, "");
+            (void)PerlIO_putc(file, '\n');
+       Perl_dump_indent(aTHX_ level, file, "  FILL = %" IVdf "\n",
+                               (IV)AvFILLp(sv));
+       Perl_dump_indent(aTHX_ level, file, "  MAX = %" IVdf "\n",
+                               (IV)AvMAX(sv));
+        SvPVCLEAR(d);
        if (AvREAL(sv)) sv_catpv(d, ",REAL");
        if (AvREIFY(sv))        sv_catpv(d, ",REIFY");
        Perl_dump_indent(aTHX_ level, file, "  FLAGS = (%s)\n",
                         SvCUR(d) ? SvPVX_const(d) + 1 : "");
-       if (nest < maxnest && av_tindex(MUTABLE_AV(sv)) >= 0) {
+       if (nest < maxnest && AvARRAY(MUTABLE_AV(sv))) {
            SSize_t count;
-           for (count = 0; count <=  av_tindex(MUTABLE_AV(sv)) && count < maxnest; count++) {
-               SV** const elt = av_fetch(MUTABLE_AV(sv),count,0);
-
-               Perl_dump_indent(aTHX_ level + 1, file, "Elt No. %"IVdf"\n", (IV)count);
-               if (elt)
-                   do_sv_dump(level+1, file, *elt, nest+1, maxnest, dumpops, pvlim);
+            SV **svp = AvARRAY(MUTABLE_AV(sv));
+           for (count = 0;
+                 count <= AvFILLp(MUTABLE_AV(sv)) && count < maxnest;
+                 count++, svp++)
+            {
+               SV* const elt = *svp;
+               Perl_dump_indent(aTHX_ level + 1, file, "Elt No. %" IVdf "\n",
+                                       (IV)count);
+                do_sv_dump(level+1, file, elt, nest+1, maxnest, dumpops, pvlim);
            }
        }
        break;
@@ -1693,10 +1696,10 @@ Perl_do_sv_dump(pTHX_ I32 level, PerlIO *file, SV *sv, I32 nest, I32 maxnest, bo
        U32 usedkeys;
         if (SvOOK(sv)) {
             struct xpvhv_aux *const aux = HvAUX(sv);
-            Perl_dump_indent(aTHX_ level, file, "  AUX_FLAGS = %"UVuf"\n",
+            Perl_dump_indent(aTHX_ level, file, "  AUX_FLAGS = %" UVuf "\n",
                              (UV)aux->xhv_aux_flags);
         }
-       Perl_dump_indent(aTHX_ level, file, "  ARRAY = 0x%"UVxf, PTR2UV(HvARRAY(sv)));
+       Perl_dump_indent(aTHX_ level, file, "  ARRAY = 0x%" UVxf, PTR2UV(HvARRAY(sv)));
        usedkeys = HvUSEDKEYS(sv);
        if (HvARRAY(sv) && usedkeys) {
            /* Show distribution of HEs in the ARRAY */
@@ -1729,7 +1732,7 @@ Perl_do_sv_dump(pTHX_ I32 level, PerlIO *file, SV *sv, I32 nest, I32 maxnest, bo
                        PerlIO_printf(file, ", ");
                }
             }
-           PerlIO_putc(file, ')');
+           (void)PerlIO_putc(file, ')');
            /* The "quality" of a hash is defined as the total number of
               comparisons needed to access every element once, relative
               to the expected number needed for a random hash.
@@ -1748,11 +1751,13 @@ Perl_do_sv_dump(pTHX_ I32 level, PerlIO *file, SV *sv, I32 nest, I32 maxnest, bo
                pow2 = pow2 << 1;
            theoret = usedkeys;
            theoret += theoret * (theoret-1)/pow2;
-           PerlIO_putc(file, '\n');
-           Perl_dump_indent(aTHX_ level, file, "  hash quality = %.1"NVff"%%", theoret/sum*100);
+           (void)PerlIO_putc(file, '\n');
+           Perl_dump_indent(aTHX_ level, file, "  hash quality = %.1"
+                                   NVff "%%", theoret/sum*100);
        }
-       PerlIO_putc(file, '\n');
-       Perl_dump_indent(aTHX_ level, file, "  KEYS = %"IVdf"\n", (IV)usedkeys);
+       (void)PerlIO_putc(file, '\n');
+       Perl_dump_indent(aTHX_ level, file, "  KEYS = %" IVdf "\n",
+                               (IV)usedkeys);
         {
             STRLEN count = 0;
             HE **ents = HvARRAY(sv);
@@ -1767,32 +1772,30 @@ Perl_do_sv_dump(pTHX_ I32 level, PerlIO *file, SV *sv, I32 nest, I32 maxnest, bo
                 } while (++ents <= last);
             }
 
-            if (SvOOK(sv)) {
-                struct xpvhv_aux *const aux = HvAUX(sv);
-                Perl_dump_indent(aTHX_ level, file, "  FILL = %"UVuf
-                                 " (cached = %"UVuf")\n",
-                                 (UV)count, (UV)aux->xhv_fill_lazy);
-            } else {
-                Perl_dump_indent(aTHX_ level, file, "  FILL = %"UVuf"\n",
-                                 (UV)count);
-            }
+            Perl_dump_indent(aTHX_ level, file, "  FILL = %" UVuf "\n",
+                             (UV)count);
         }
-       Perl_dump_indent(aTHX_ level, file, "  MAX = %"IVdf"\n", (IV)HvMAX(sv));
+       Perl_dump_indent(aTHX_ level, file, "  MAX = %" IVdf "\n",
+                               (IV)HvMAX(sv));
         if (SvOOK(sv)) {
-           Perl_dump_indent(aTHX_ level, file, "  RITER = %"IVdf"\n", (IV)HvRITER_get(sv));
-           Perl_dump_indent(aTHX_ level, file, "  EITER = 0x%"UVxf"\n", PTR2UV(HvEITER_get(sv)));
+           Perl_dump_indent(aTHX_ level, file, "  RITER = %" IVdf "\n",
+                                   (IV)HvRITER_get(sv));
+           Perl_dump_indent(aTHX_ level, file, "  EITER = 0x%" UVxf "\n",
+                                   PTR2UV(HvEITER_get(sv)));
 #ifdef PERL_HASH_RANDOMIZE_KEYS
-           Perl_dump_indent(aTHX_ level, file, "  RAND = 0x%"UVxf, (UV)HvRAND_get(sv));
+           Perl_dump_indent(aTHX_ level, file, "  RAND = 0x%" UVxf,
+                                   (UV)HvRAND_get(sv));
             if (HvRAND_get(sv) != HvLASTRAND_get(sv) && HvRITER_get(sv) != -1 ) {
-                PerlIO_printf(file, " (LAST = 0x%"UVxf")", (UV)HvLASTRAND_get(sv));
+                PerlIO_printf(file, " (LAST = 0x%" UVxf ")",
+                                    (UV)HvLASTRAND_get(sv));
             }
 #endif
-            PerlIO_putc(file, '\n');
+            (void)PerlIO_putc(file, '\n');
         }
        {
            MAGIC * const mg = mg_find(sv, PERL_MAGIC_symtab);
            if (mg && mg->mg_obj) {
-               Perl_dump_indent(aTHX_ level, file, "  PMROOT = 0x%"UVxf"\n", PTR2UV(mg->mg_obj));
+               Perl_dump_indent(aTHX_ level, file, "  PMROOT = 0x%" UVxf "\n", PTR2UV(mg->mg_obj));
            }
        }
        {
@@ -1810,7 +1813,7 @@ Perl_do_sv_dump(pTHX_ I32 level, PerlIO *file, SV *sv, I32 nest, I32 maxnest, bo
            struct mro_meta * const meta = HvAUX(sv)->xhv_mro_meta;
            if (HvAUX(sv)->xhv_name_count)
                Perl_dump_indent(aTHX_
-                level, file, "  NAMECOUNT = %"IVdf"\n",
+                level, file, "  NAMECOUNT = %" IVdf "\n",
                 (IV)HvAUX(sv)->xhv_name_count
                );
            if (HvAUX(sv)->xhv_name_u.xhvnameu_name && HvENAME_HEK_NN(sv)) {
@@ -1824,7 +1827,7 @@ Perl_do_sv_dump(pTHX_ I32 level, PerlIO *file, SV *sv, I32 nest, I32 maxnest, bo
                    HEK *const *const endp = HvAUX(sv)->xhv_name_u.xhvnameu_names
                        + (count < 0 ? -count : count);
                    while (hekp < endp) {
-                       if (HEK_LEN(*hekp)) {
+                       if (*hekp) {
              SV *tmp = newSVpvs_flags("", SVs_TEMP);
                            Perl_sv_catpvf(aTHX_ names, ", \"%s\"",
                               generic_pv_escape(tmp, HEK_KEY(*hekp), HEK_LEN(*hekp), HEK_UTF8(*hekp)));
@@ -1848,42 +1851,47 @@ Perl_do_sv_dump(pTHX_ I32 level, PerlIO *file, SV *sv, I32 nest, I32 maxnest, bo
                 }
            }
            if (backrefs) {
-               Perl_dump_indent(aTHX_ level, file, "  BACKREFS = 0x%"UVxf"\n",
+               Perl_dump_indent(aTHX_ level, file, "  BACKREFS = 0x%" UVxf "\n",
                                 PTR2UV(backrefs));
                do_sv_dump(level+1, file, MUTABLE_SV(backrefs), nest+1, maxnest,
                           dumpops, pvlim);
            }
            if (meta) {
                SV* tmpsv = newSVpvs_flags("", SVs_TEMP);
-               Perl_dump_indent(aTHX_ level, file, "  MRO_WHICH = \"%s\" (0x%"UVxf")\n",
+               Perl_dump_indent(aTHX_ level, file, "  MRO_WHICH = \"%s\" (0x%"
+                                 UVxf ")\n",
                                 generic_pv_escape( tmpsv, meta->mro_which->name,
                                 meta->mro_which->length,
                                 (meta->mro_which->kflags & HVhek_UTF8)),
                                 PTR2UV(meta->mro_which));
-               Perl_dump_indent(aTHX_ level, file, "  CACHE_GEN = 0x%"UVxf"\n",
+               Perl_dump_indent(aTHX_ level, file, "  CACHE_GEN = 0x%"
+                                 UVxf "\n",
                                 (UV)meta->cache_gen);
-               Perl_dump_indent(aTHX_ level, file, "  PKG_GEN = 0x%"UVxf"\n",
+               Perl_dump_indent(aTHX_ level, file, "  PKG_GEN = 0x%" UVxf "\n",
                                 (UV)meta->pkg_gen);
                if (meta->mro_linear_all) {
-                   Perl_dump_indent(aTHX_ level, file, "  MRO_LINEAR_ALL = 0x%"UVxf"\n",
+                   Perl_dump_indent(aTHX_ level, file, "  MRO_LINEAR_ALL = 0x%"
+                                 UVxf "\n",
                                 PTR2UV(meta->mro_linear_all));
                do_sv_dump(level+1, file, MUTABLE_SV(meta->mro_linear_all), nest+1, maxnest,
                           dumpops, pvlim);
                }
                if (meta->mro_linear_current) {
-                   Perl_dump_indent(aTHX_ level, file, "  MRO_LINEAR_CURRENT = 0x%"UVxf"\n",
+                   Perl_dump_indent(aTHX_ level, file,
+                                 "  MRO_LINEAR_CURRENT = 0x%" UVxf "\n",
                                 PTR2UV(meta->mro_linear_current));
                do_sv_dump(level+1, file, MUTABLE_SV(meta->mro_linear_current), nest+1, maxnest,
                           dumpops, pvlim);
                }
                if (meta->mro_nextmethod) {
-                   Perl_dump_indent(aTHX_ level, file, "  MRO_NEXTMETHOD = 0x%"UVxf"\n",
+                   Perl_dump_indent(aTHX_ level, file,
+                                 "  MRO_NEXTMETHOD = 0x%" UVxf "\n",
                                 PTR2UV(meta->mro_nextmethod));
                do_sv_dump(level+1, file, MUTABLE_SV(meta->mro_nextmethod), nest+1, maxnest,
                           dumpops, pvlim);
                }
                if (meta->isa) {
-                   Perl_dump_indent(aTHX_ level, file, "  ISA = 0x%"UVxf"\n",
+                   Perl_dump_indent(aTHX_ level, file, "  ISA = 0x%" UVxf "\n",
                                 PTR2UV(meta->isa));
                do_sv_dump(level+1, file, MUTABLE_SV(meta->isa), nest+1, maxnest,
                           dumpops, pvlim);
@@ -1917,7 +1925,7 @@ Perl_do_sv_dump(pTHX_ I32 level, PerlIO *file, SV *sv, I32 nest, I32 maxnest, bo
                             PerlIO_printf(file, "[UTF8 \"%s\"] ", sv_uni_display(d, keysv, 6 * SvCUR(keysv), UNI_DISPLAY_QQ));
                        if (HvEITER_get(hv) == he)
                            PerlIO_printf(file, "[CURRENT] ");
-                        PerlIO_printf(file, "HASH = 0x%"UVxf"\n", (UV) hash);
+                        PerlIO_printf(file, "HASH = 0x%" UVxf "\n", (UV) hash);
                         do_sv_dump(level+1, file, elt, nest+1, maxnest, dumpops, pvlim);
                     }
                }
@@ -1947,12 +1955,17 @@ Perl_do_sv_dump(pTHX_ I32 level, PerlIO *file, SV *sv, I32 nest, I32 maxnest, bo
        do_hv_dump(level, file, "  COMP_STASH", CvSTASH(sv));
        if (!CvISXSUB(sv)) {
            if (CvSTART(sv)) {
-               Perl_dump_indent(aTHX_ level, file,
-                                "  START = 0x%"UVxf" ===> %"IVdf"\n",
+                if (CvSLABBED(sv))
+                    Perl_dump_indent(aTHX_ level, file,
+                                "  SLAB = 0x%" UVxf "\n",
+                                PTR2UV(CvSTART(sv)));
+                else
+                    Perl_dump_indent(aTHX_ level, file,
+                                "  START = 0x%" UVxf " ===> %" IVdf "\n",
                                 PTR2UV(CvSTART(sv)),
                                 (IV)sequence_num(CvSTART(sv)));
            }
-           Perl_dump_indent(aTHX_ level, file, "  ROOT = 0x%"UVxf"\n",
+           Perl_dump_indent(aTHX_ level, file, "  ROOT = 0x%" UVxf "\n",
                             PTR2UV(CvROOT(sv)));
            if (CvROOT(sv) && dumpops) {
                do_op_dump(level+1, file, CvROOT(sv));
@@ -1960,16 +1973,16 @@ Perl_do_sv_dump(pTHX_ I32 level, PerlIO *file, SV *sv, I32 nest, I32 maxnest, bo
        } else {
            SV * const constant = cv_const_sv((const CV *)sv);
 
-           Perl_dump_indent(aTHX_ level, file, "  XSUB = 0x%"UVxf"\n", PTR2UV(CvXSUB(sv)));
+           Perl_dump_indent(aTHX_ level, file, "  XSUB = 0x%" UVxf "\n", PTR2UV(CvXSUB(sv)));
 
            if (constant) {
-               Perl_dump_indent(aTHX_ level, file, "  XSUBANY = 0x%"UVxf
+               Perl_dump_indent(aTHX_ level, file, "  XSUBANY = 0x%" UVxf
                                 " (CONST SV)\n",
                                 PTR2UV(CvXSUBANY(sv).any_ptr));
                do_sv_dump(level+1, file, constant, nest+1, maxnest, dumpops,
                           pvlim);
            } else {
-               Perl_dump_indent(aTHX_ level, file, "  XSUBANY = %"IVdf"\n",
+               Perl_dump_indent(aTHX_ level, file, "  XSUBANY = %" IVdf "\n",
                                 (IV)CvXSUBANY(sv).any_i32);
            }
        }
@@ -1978,16 +1991,22 @@ Perl_do_sv_dump(pTHX_ I32 level, PerlIO *file, SV *sv, I32 nest, I32 maxnest, bo
                                   HEK_KEY(CvNAME_HEK((CV *)sv)));
        else do_gvgv_dump(level, file, "  GVGV::GV", CvGV(sv));
        Perl_dump_indent(aTHX_ level, file, "  FILE = \"%s\"\n", CvFILE(sv));
-       Perl_dump_indent(aTHX_ level, file, "  DEPTH = %"IVdf"\n", (IV)CvDEPTH(sv));
-       Perl_dump_indent(aTHX_ level, file, "  FLAGS = 0x%"UVxf"\n", (UV)CvFLAGS(sv));
-       Perl_dump_indent(aTHX_ level, file, "  OUTSIDE_SEQ = %"UVuf"\n", (UV)CvOUTSIDE_SEQ(sv));
-       Perl_dump_indent(aTHX_ level, file, "  PADLIST = 0x%"UVxf"\n", PTR2UV(CvPADLIST(sv)));
-       if (nest < maxnest) {
-           do_dump_pad(level+1, file, CvPADLIST(sv), 0);
+       Perl_dump_indent(aTHX_ level, file, "  DEPTH = %"
+                                      IVdf "\n", (IV)CvDEPTH(sv));
+       Perl_dump_indent(aTHX_ level, file, "  FLAGS = 0x%" UVxf "\n",
+                               (UV)CvFLAGS(sv));
+       Perl_dump_indent(aTHX_ level, file, "  OUTSIDE_SEQ = %" UVuf "\n", (UV)CvOUTSIDE_SEQ(sv));
+       if (!CvISXSUB(sv)) {
+           Perl_dump_indent(aTHX_ level, file, "  PADLIST = 0x%" UVxf "\n", PTR2UV(CvPADLIST(sv)));
+           if (nest < maxnest) {
+               do_dump_pad(level+1, file, CvPADLIST(sv), 0);
+           }
        }
+       else
+           Perl_dump_indent(aTHX_ level, file, "  HSCXT = 0x%p\n", CvHSCXT(sv));
        {
            const CV * const outside = CvOUTSIDE(sv);
-           Perl_dump_indent(aTHX_ level, file, "  OUTSIDE = 0x%"UVxf" (%s)\n",
+           Perl_dump_indent(aTHX_ level, file, "  OUTSIDE = 0x%" UVxf " (%s)\n",
                        PTR2UV(outside),
                        (!outside ? "null"
                         : CvANON(outside) ? "ANON"
@@ -2001,7 +2020,8 @@ Perl_do_sv_dump(pTHX_ I32 level, PerlIO *file, SV *sv, I32 nest, I32 maxnest, bo
                                 GvNAMEUTF8(CvGV(outside)))
                         : "UNDEFINED"));
        }
-       if (nest < maxnest && (CvCLONE(sv) || CvCLONED(sv)))
+       if (CvOUTSIDE(sv)
+        && (nest < maxnest && (CvCLONE(sv) || CvCLONED(sv))))
            do_sv_dump(level+1, file, MUTABLE_SV(CvOUTSIDE(sv)), nest+1, maxnest, dumpops, pvlim);
        break;
 
@@ -2009,10 +2029,10 @@ Perl_do_sv_dump(pTHX_ I32 level, PerlIO *file, SV *sv, I32 nest, I32 maxnest, bo
     case SVt_PVLV:
        if (type == SVt_PVLV) {
            Perl_dump_indent(aTHX_ level, file, "  TYPE = %c\n", LvTYPE(sv));
-           Perl_dump_indent(aTHX_ level, file, "  TARGOFF = %"IVdf"\n", (IV)LvTARGOFF(sv));
-           Perl_dump_indent(aTHX_ level, file, "  TARGLEN = %"IVdf"\n", (IV)LvTARGLEN(sv));
-           Perl_dump_indent(aTHX_ level, file, "  TARG = 0x%"UVxf"\n", PTR2UV(LvTARG(sv)));
-           Perl_dump_indent(aTHX_ level, file, "  FLAGS = %"IVdf"\n", (IV)LvFLAGS(sv));
+           Perl_dump_indent(aTHX_ level, file, "  TARGOFF = %" IVdf "\n", (IV)LvTARGOFF(sv));
+           Perl_dump_indent(aTHX_ level, file, "  TARGLEN = %" IVdf "\n", (IV)LvTARGLEN(sv));
+           Perl_dump_indent(aTHX_ level, file, "  TARG = 0x%" UVxf "\n", PTR2UV(LvTARG(sv)));
+           Perl_dump_indent(aTHX_ level, file, "  FLAGS = %" IVdf "\n", (IV)LvFLAGS(sv));
            if (isALPHA_FOLD_NE(LvTYPE(sv), 't'))
                do_sv_dump(level+1, file, LvTARG(sv), nest+1, maxnest,
                    dumpops, pvlim);
@@ -2027,38 +2047,42 @@ Perl_do_sv_dump(pTHX_ I32 level, PerlIO *file, SV *sv, I32 nest, I32 maxnest, bo
                                       GvNAMELEN(sv),
                                       GvNAMEUTF8(sv)));
        }
-       Perl_dump_indent(aTHX_ level, file, "  NAMELEN = %"IVdf"\n", (IV)GvNAMELEN(sv));
+       Perl_dump_indent(aTHX_ level, file, "  NAMELEN = %" IVdf "\n", (IV)GvNAMELEN(sv));
        do_hv_dump (level, file, "  GvSTASH", GvSTASH(sv));
-       Perl_dump_indent(aTHX_ level, file, "  GP = 0x%"UVxf"\n", PTR2UV(GvGP(sv)));
+       Perl_dump_indent(aTHX_ level, file, "  FLAGS = 0x%" UVxf "\n", (UV)GvFLAGS(sv));
+       Perl_dump_indent(aTHX_ level, file, "  GP = 0x%" UVxf "\n", PTR2UV(GvGP(sv)));
        if (!GvGP(sv))
            break;
-       Perl_dump_indent(aTHX_ level, file, "    SV = 0x%"UVxf"\n", PTR2UV(GvSV(sv)));
-       Perl_dump_indent(aTHX_ level, file, "    REFCNT = %"IVdf"\n", (IV)GvREFCNT(sv));
-       Perl_dump_indent(aTHX_ level, file, "    IO = 0x%"UVxf"\n", PTR2UV(GvIOp(sv)));
-       Perl_dump_indent(aTHX_ level, file, "    FORM = 0x%"UVxf"  \n", PTR2UV(GvFORM(sv)));
-       Perl_dump_indent(aTHX_ level, file, "    AV = 0x%"UVxf"\n", PTR2UV(GvAV(sv)));
-       Perl_dump_indent(aTHX_ level, file, "    HV = 0x%"UVxf"\n", PTR2UV(GvHV(sv)));
-       Perl_dump_indent(aTHX_ level, file, "    CV = 0x%"UVxf"\n", PTR2UV(GvCV(sv)));
-       Perl_dump_indent(aTHX_ level, file, "    CVGEN = 0x%"UVxf"\n", (UV)GvCVGEN(sv));
-       Perl_dump_indent(aTHX_ level, file, "    LINE = %"IVdf"\n", (IV)GvLINE(sv));
+       Perl_dump_indent(aTHX_ level, file, "    SV = 0x%" UVxf "\n", PTR2UV(GvSV(sv)));
+       Perl_dump_indent(aTHX_ level, file, "    REFCNT = %" IVdf "\n", (IV)GvREFCNT(sv));
+       Perl_dump_indent(aTHX_ level, file, "    IO = 0x%" UVxf "\n", PTR2UV(GvIOp(sv)));
+       Perl_dump_indent(aTHX_ level, file, "    FORM = 0x%" UVxf "  \n", PTR2UV(GvFORM(sv)));
+       Perl_dump_indent(aTHX_ level, file, "    AV = 0x%" UVxf "\n", PTR2UV(GvAV(sv)));
+       Perl_dump_indent(aTHX_ level, file, "    HV = 0x%" UVxf "\n", PTR2UV(GvHV(sv)));
+       Perl_dump_indent(aTHX_ level, file, "    CV = 0x%" UVxf "\n", PTR2UV(GvCV(sv)));
+       Perl_dump_indent(aTHX_ level, file, "    CVGEN = 0x%" UVxf "\n", (UV)GvCVGEN(sv));
+       Perl_dump_indent(aTHX_ level, file, "    GPFLAGS = 0x%" UVxf
+                                           " (%s)\n",
+                              (UV)GvGPFLAGS(sv),
+                              "");
+       Perl_dump_indent(aTHX_ level, file, "    LINE = %" IVdf "\n", (IV)GvLINE(sv));
        Perl_dump_indent(aTHX_ level, file, "    FILE = \"%s\"\n", GvFILE(sv));
-       Perl_dump_indent(aTHX_ level, file, "    FLAGS = 0x%"UVxf"\n", (UV)GvFLAGS(sv));
        do_gv_dump (level, file, "    EGV", GvEGV(sv));
        break;
     case SVt_PVIO:
-       Perl_dump_indent(aTHX_ level, file, "  IFP = 0x%"UVxf"\n", PTR2UV(IoIFP(sv)));
-       Perl_dump_indent(aTHX_ level, file, "  OFP = 0x%"UVxf"\n", PTR2UV(IoOFP(sv)));
-       Perl_dump_indent(aTHX_ level, file, "  DIRP = 0x%"UVxf"\n", PTR2UV(IoDIRP(sv)));
-       Perl_dump_indent(aTHX_ level, file, "  LINES = %"IVdf"\n", (IV)IoLINES(sv));
-       Perl_dump_indent(aTHX_ level, file, "  PAGE = %"IVdf"\n", (IV)IoPAGE(sv));
-       Perl_dump_indent(aTHX_ level, file, "  PAGE_LEN = %"IVdf"\n", (IV)IoPAGE_LEN(sv));
-       Perl_dump_indent(aTHX_ level, file, "  LINES_LEFT = %"IVdf"\n", (IV)IoLINES_LEFT(sv));
+       Perl_dump_indent(aTHX_ level, file, "  IFP = 0x%" UVxf "\n", PTR2UV(IoIFP(sv)));
+       Perl_dump_indent(aTHX_ level, file, "  OFP = 0x%" UVxf "\n", PTR2UV(IoOFP(sv)));
+       Perl_dump_indent(aTHX_ level, file, "  DIRP = 0x%" UVxf "\n", PTR2UV(IoDIRP(sv)));
+       Perl_dump_indent(aTHX_ level, file, "  LINES = %" IVdf "\n", (IV)IoLINES(sv));
+       Perl_dump_indent(aTHX_ level, file, "  PAGE = %" IVdf "\n", (IV)IoPAGE(sv));
+       Perl_dump_indent(aTHX_ level, file, "  PAGE_LEN = %" IVdf "\n", (IV)IoPAGE_LEN(sv));
+       Perl_dump_indent(aTHX_ level, file, "  LINES_LEFT = %" IVdf "\n", (IV)IoLINES_LEFT(sv));
         if (IoTOP_NAME(sv))
             Perl_dump_indent(aTHX_ level, file, "  TOP_NAME = \"%s\"\n", IoTOP_NAME(sv));
        if (!IoTOP_GV(sv) || SvTYPE(IoTOP_GV(sv)) == SVt_PVGV)
            do_gv_dump (level, file, "  TOP_GV", IoTOP_GV(sv));
        else {
-           Perl_dump_indent(aTHX_ level, file, "  TOP_GV = 0x%"UVxf"\n",
+           Perl_dump_indent(aTHX_ level, file, "  TOP_GV = 0x%" UVxf "\n",
                             PTR2UV(IoTOP_GV(sv)));
            do_sv_dump (level+1, file, MUTABLE_SV(IoTOP_GV(sv)), nest+1,
                        maxnest, dumpops, pvlim);
@@ -2070,7 +2094,7 @@ Perl_do_sv_dump(pTHX_ I32 level, PerlIO *file, SV *sv, I32 nest, I32 maxnest, bo
        if (!IoFMT_GV(sv) || SvTYPE(IoFMT_GV(sv)) == SVt_PVGV)
            do_gv_dump (level, file, "  FMT_GV", IoFMT_GV(sv));
        else {
-           Perl_dump_indent(aTHX_ level, file, "  FMT_GV = 0x%"UVxf"\n",
+           Perl_dump_indent(aTHX_ level, file, "  FMT_GV = 0x%" UVxf "\n",
                             PTR2UV(IoFMT_GV(sv)));
            do_sv_dump (level+1, file, MUTABLE_SV(IoFMT_GV(sv)), nest+1,
                        maxnest, dumpops, pvlim);
@@ -2080,7 +2104,7 @@ Perl_do_sv_dump(pTHX_ I32 level, PerlIO *file, SV *sv, I32 nest, I32 maxnest, bo
        if (!IoBOTTOM_GV(sv) || SvTYPE(IoBOTTOM_GV(sv)) == SVt_PVGV)
            do_gv_dump (level, file, "  BOTTOM_GV", IoBOTTOM_GV(sv));
        else {
-           Perl_dump_indent(aTHX_ level, file, "  BOTTOM_GV = 0x%"UVxf"\n",
+           Perl_dump_indent(aTHX_ level, file, "  BOTTOM_GV = 0x%" UVxf "\n",
                             PTR2UV(IoBOTTOM_GV(sv)));
            do_sv_dump (level+1, file, MUTABLE_SV(IoBOTTOM_GV(sv)), nest+1,
                        maxnest, dumpops, pvlim);
@@ -2089,7 +2113,7 @@ Perl_do_sv_dump(pTHX_ I32 level, PerlIO *file, SV *sv, I32 nest, I32 maxnest, bo
             Perl_dump_indent(aTHX_ level, file, "  TYPE = '%c'\n", IoTYPE(sv));
        else
             Perl_dump_indent(aTHX_ level, file, "  TYPE = '\\%o'\n", IoTYPE(sv));
-       Perl_dump_indent(aTHX_ level, file, "  FLAGS = 0x%"UVxf"\n", (UV)IoFLAGS(sv));
+       Perl_dump_indent(aTHX_ level, file, "  FLAGS = 0x%" UVxf "\n", (UV)IoFLAGS(sv));
        break;
     case SVt_REGEXP:
       dumpregexp:
@@ -2105,67 +2129,67 @@ Perl_do_sv_dump(pTHX_ I32 level, PerlIO *file, SV *sv, I32 nest, I32 maxnest, bo
             }                                               \
 } STMT_END
             SV_SET_STRINGIFY_REGEXP_FLAGS(d,r->compflags,regexp_extflags_names);
-            Perl_dump_indent(aTHX_ level, file, "  COMPFLAGS = 0x%"UVxf" (%s)\n",
+            Perl_dump_indent(aTHX_ level, file, "  COMPFLAGS = 0x%" UVxf " (%s)\n",
                                 (UV)(r->compflags), SvPVX_const(d));
 
             SV_SET_STRINGIFY_REGEXP_FLAGS(d,r->extflags,regexp_extflags_names);
-           Perl_dump_indent(aTHX_ level, file, "  EXTFLAGS = 0x%"UVxf" (%s)\n",
+           Perl_dump_indent(aTHX_ level, file, "  EXTFLAGS = 0x%" UVxf " (%s)\n",
                                 (UV)(r->extflags), SvPVX_const(d));
 
-            Perl_dump_indent(aTHX_ level, file, "  ENGINE = 0x%"UVxf" (%s)\n",
+            Perl_dump_indent(aTHX_ level, file, "  ENGINE = 0x%" UVxf " (%s)\n",
                                 PTR2UV(r->engine), (r->engine == &PL_core_reg_engine) ? "STANDARD" : "PLUG-IN" );
             if (r->engine == &PL_core_reg_engine) {
                 SV_SET_STRINGIFY_REGEXP_FLAGS(d,r->intflags,regexp_core_intflags_names);
-                Perl_dump_indent(aTHX_ level, file, "  INTFLAGS = 0x%"UVxf" (%s)\n",
+                Perl_dump_indent(aTHX_ level, file, "  INTFLAGS = 0x%" UVxf " (%s)\n",
                                 (UV)(r->intflags), SvPVX_const(d));
             } else {
-                Perl_dump_indent(aTHX_ level, file, "  INTFLAGS = 0x%"UVxf"\n",
+                Perl_dump_indent(aTHX_ level, file, "  INTFLAGS = 0x%" UVxf "\n",
                                (UV)(r->intflags));
             }
 #undef SV_SET_STRINGIFY_REGEXP_FLAGS
-           Perl_dump_indent(aTHX_ level, file, "  NPARENS = %"UVuf"\n",
+           Perl_dump_indent(aTHX_ level, file, "  NPARENS = %" UVuf "\n",
                                (UV)(r->nparens));
-           Perl_dump_indent(aTHX_ level, file, "  LASTPAREN = %"UVuf"\n",
+           Perl_dump_indent(aTHX_ level, file, "  LASTPAREN = %" UVuf "\n",
                                (UV)(r->lastparen));
-           Perl_dump_indent(aTHX_ level, file, "  LASTCLOSEPAREN = %"UVuf"\n",
+           Perl_dump_indent(aTHX_ level, file, "  LASTCLOSEPAREN = %" UVuf "\n",
                                (UV)(r->lastcloseparen));
-           Perl_dump_indent(aTHX_ level, file, "  MINLEN = %"IVdf"\n",
+           Perl_dump_indent(aTHX_ level, file, "  MINLEN = %" IVdf "\n",
                                (IV)(r->minlen));
-           Perl_dump_indent(aTHX_ level, file, "  MINLENRET = %"IVdf"\n",
+           Perl_dump_indent(aTHX_ level, file, "  MINLENRET = %" IVdf "\n",
                                (IV)(r->minlenret));
-           Perl_dump_indent(aTHX_ level, file, "  GOFS = %"UVuf"\n",
+           Perl_dump_indent(aTHX_ level, file, "  GOFS = %" UVuf "\n",
                                (UV)(r->gofs));
-           Perl_dump_indent(aTHX_ level, file, "  PRE_PREFIX = %"UVuf"\n",
+           Perl_dump_indent(aTHX_ level, file, "  PRE_PREFIX = %" UVuf "\n",
                                (UV)(r->pre_prefix));
-           Perl_dump_indent(aTHX_ level, file, "  SUBLEN = %"IVdf"\n",
+           Perl_dump_indent(aTHX_ level, file, "  SUBLEN = %" IVdf "\n",
                                (IV)(r->sublen));
-           Perl_dump_indent(aTHX_ level, file, "  SUBOFFSET = %"IVdf"\n",
+           Perl_dump_indent(aTHX_ level, file, "  SUBOFFSET = %" IVdf "\n",
                                (IV)(r->suboffset));
-           Perl_dump_indent(aTHX_ level, file, "  SUBCOFFSET = %"IVdf"\n",
+           Perl_dump_indent(aTHX_ level, file, "  SUBCOFFSET = %" IVdf "\n",
                                (IV)(r->subcoffset));
            if (r->subbeg)
-               Perl_dump_indent(aTHX_ level, file, "  SUBBEG = 0x%"UVxf" %s\n",
+               Perl_dump_indent(aTHX_ level, file, "  SUBBEG = 0x%" UVxf " %s\n",
                            PTR2UV(r->subbeg),
                            pv_display(d, r->subbeg, r->sublen, 50, pvlim));
            else
                Perl_dump_indent(aTHX_ level, file, "  SUBBEG = 0x0\n");
-           Perl_dump_indent(aTHX_ level, file, "  MOTHER_RE = 0x%"UVxf"\n",
+           Perl_dump_indent(aTHX_ level, file, "  MOTHER_RE = 0x%" UVxf "\n",
                                PTR2UV(r->mother_re));
            if (nest < maxnest && r->mother_re)
                do_sv_dump(level+1, file, (SV *)r->mother_re, nest+1,
                           maxnest, dumpops, pvlim);
-           Perl_dump_indent(aTHX_ level, file, "  PAREN_NAMES = 0x%"UVxf"\n",
+           Perl_dump_indent(aTHX_ level, file, "  PAREN_NAMES = 0x%" UVxf "\n",
                                PTR2UV(r->paren_names));
-           Perl_dump_indent(aTHX_ level, file, "  SUBSTRS = 0x%"UVxf"\n",
+           Perl_dump_indent(aTHX_ level, file, "  SUBSTRS = 0x%" UVxf "\n",
                                PTR2UV(r->substrs));
-           Perl_dump_indent(aTHX_ level, file, "  PPRIVATE = 0x%"UVxf"\n",
+           Perl_dump_indent(aTHX_ level, file, "  PPRIVATE = 0x%" UVxf "\n",
                                PTR2UV(r->pprivate));
-           Perl_dump_indent(aTHX_ level, file, "  OFFS = 0x%"UVxf"\n",
+           Perl_dump_indent(aTHX_ level, file, "  OFFS = 0x%" UVxf "\n",
                                PTR2UV(r->offs));
-           Perl_dump_indent(aTHX_ level, file, "  QR_ANONCV = 0x%"UVxf"\n",
+           Perl_dump_indent(aTHX_ level, file, "  QR_ANONCV = 0x%" UVxf "\n",
                                PTR2UV(r->qr_anoncv));
 #ifdef PERL_ANY_COW
-           Perl_dump_indent(aTHX_ level, file, "  SAVED_COPY = 0x%"UVxf"\n",
+           Perl_dump_indent(aTHX_ level, file, "  SAVED_COPY = 0x%" UVxf "\n",
                                PTR2UV(r->saved_copy));
 #endif
        }
@@ -2209,9 +2233,11 @@ Perl_runops_debug(pTHX)
         ++PL_op_exec_cnt[PL_op->op_type];
 #endif
        if (PL_debug) {
+            ENTER;
+            SAVETMPS;
            if (PL_watchaddr && (*PL_watchaddr != PL_watchok))
                PerlIO_printf(Perl_debug_log,
-                             "WARNING: %"UVxf" changed from %"UVxf" to %"UVxf"\n",
+                             "WARNING: %" UVxf " changed from %" UVxf " to %" UVxf "\n",
                              PTR2UV(PL_watchaddr), PTR2UV(PL_watchok),
                              PTR2UV(*PL_watchaddr));
            if (DEBUG_s_TEST_) {
@@ -2226,9 +2252,11 @@ Perl_runops_debug(pTHX)
 
            if (DEBUG_t_TEST_) debop(PL_op);
            if (DEBUG_P_TEST_) debprof(PL_op);
+            FREETMPS;
+            LEAVE;
        }
 
-        OP_ENTRY_PROBE(OP_NAME(PL_op));
+        PERL_DTRACE_PROBE_OP(PL_op);
     } while ((PL_op = PL_op->op_ppaddr(aTHX)));
     DEBUG_l(Perl_deb(aTHX_ "leaving RUNOPS level\n"));
     PERL_ASYNC_CHECK();
@@ -2237,11 +2265,242 @@ Perl_runops_debug(pTHX)
     return 0;
 }
 
+
+/* print the names of the n lexical vars starting at pad offset off */
+
+STATIC void
+S_deb_padvar(pTHX_ PADOFFSET off, int n, bool paren)
+{
+    PADNAME *sv;
+    CV * const cv = deb_curcv(cxstack_ix);
+    PADNAMELIST *comppad = NULL;
+    int i;
+
+    if (cv) {
+        PADLIST * const padlist = CvPADLIST(cv);
+        comppad = PadlistNAMES(padlist);
+    }
+    if (paren)
+        PerlIO_printf(Perl_debug_log, "(");
+    for (i = 0; i < n; i++) {
+        if (comppad && (sv = padnamelist_fetch(comppad, off + i)))
+            PerlIO_printf(Perl_debug_log, "%" PNf, PNfARG(sv));
+        else
+            PerlIO_printf(Perl_debug_log, "[%" UVuf "]",
+                    (UV)(off+i));
+        if (i < n - 1)
+            PerlIO_printf(Perl_debug_log, ",");
+    }
+    if (paren)
+        PerlIO_printf(Perl_debug_log, ")");
+}
+
+
+/* append to the out SV, the name of the lexical at offset off in the CV
+ * cv */
+
+static void
+S_append_padvar(pTHX_ PADOFFSET off, CV *cv, SV *out, int n,
+        bool paren, bool is_scalar)
+{
+    PADNAME *sv;
+    PADNAMELIST *namepad = NULL;
+    int i;
+
+    if (cv) {
+        PADLIST * const padlist = CvPADLIST(cv);
+        namepad = PadlistNAMES(padlist);
+    }
+
+    if (paren)
+        sv_catpvs_nomg(out, "(");
+    for (i = 0; i < n; i++) {
+        if (namepad && (sv = padnamelist_fetch(namepad, off + i)))
+        {
+            STRLEN cur = SvCUR(out);
+            Perl_sv_catpvf(aTHX_ out, "[%" UTF8f,
+                                 UTF8fARG(1, PadnameLEN(sv) - 1,
+                                          PadnamePV(sv) + 1));
+            if (is_scalar)
+                SvPVX(out)[cur] = '$';
+        }
+        else
+            Perl_sv_catpvf(aTHX_ out, "[%" UVuf "]", (UV)(off+i));
+        if (i < n - 1)
+            sv_catpvs_nomg(out, ",");
+    }
+    if (paren)
+        sv_catpvs_nomg(out, "(");
+}
+
+
+static void
+S_append_gv_name(pTHX_ GV *gv, SV *out)
+{
+    SV *sv;
+    if (!gv) {
+        sv_catpvs_nomg(out, "<NULLGV>");
+        return;
+    }
+    sv = newSV(0);
+    gv_fullname4(sv, gv, NULL, FALSE);
+    Perl_sv_catpvf(aTHX_ out, "$%" SVf, SVfARG(sv));
+    SvREFCNT_dec_NN(sv);
+}
+
+#ifdef USE_ITHREADS
+#  define ITEM_SV(item) (comppad ? \
+    *av_fetch(comppad, (item)->pad_offset, FALSE) : NULL);
+#else
+#  define ITEM_SV(item) UNOP_AUX_item_sv(item)
+#endif
+
+
+/* return a temporary SV containing a stringified representation of
+ * the op_aux field of a MULTIDEREF op, associated with CV cv
+ */
+
+SV*
+Perl_multideref_stringify(pTHX_ const OP *o, CV *cv)
+{
+    UNOP_AUX_item *items = cUNOP_AUXo->op_aux;
+    UV actions = items->uv;
+    SV *sv;
+    bool last = 0;
+    bool is_hash = FALSE;
+    int derefs = 0;
+    SV *out = newSVpvn_flags("",0,SVs_TEMP);
+#ifdef USE_ITHREADS
+    PAD *comppad;
+
+    if (cv) {
+        PADLIST *padlist = CvPADLIST(cv);
+        comppad = PadlistARRAY(padlist)[1];
+    }
+    else
+        comppad = NULL;
+#endif
+
+    PERL_ARGS_ASSERT_MULTIDEREF_STRINGIFY;
+
+    while (!last) {
+        switch (actions & MDEREF_ACTION_MASK) {
+
+        case MDEREF_reload:
+            actions = (++items)->uv;
+            continue;
+            NOT_REACHED; /* NOTREACHED */
+
+        case MDEREF_HV_padhv_helem:
+            is_hash = TRUE;
+            /* FALLTHROUGH */
+        case MDEREF_AV_padav_aelem:
+            derefs = 1;
+            S_append_padvar(aTHX_ (++items)->pad_offset, cv, out, 1, 0, 1);
+            goto do_elem;
+            NOT_REACHED; /* NOTREACHED */
+
+        case MDEREF_HV_gvhv_helem:
+            is_hash = TRUE;
+            /* FALLTHROUGH */
+        case MDEREF_AV_gvav_aelem:
+            derefs = 1;
+            items++;
+            sv = ITEM_SV(items);
+            S_append_gv_name(aTHX_ (GV*)sv, out);
+            goto do_elem;
+            NOT_REACHED; /* NOTREACHED */
+
+        case MDEREF_HV_gvsv_vivify_rv2hv_helem:
+            is_hash = TRUE;
+            /* FALLTHROUGH */
+        case MDEREF_AV_gvsv_vivify_rv2av_aelem:
+            items++;
+            sv = ITEM_SV(items);
+            S_append_gv_name(aTHX_ (GV*)sv, out);
+            goto do_vivify_rv2xv_elem;
+            NOT_REACHED; /* NOTREACHED */
+
+        case MDEREF_HV_padsv_vivify_rv2hv_helem:
+            is_hash = TRUE;
+            /* FALLTHROUGH */
+        case MDEREF_AV_padsv_vivify_rv2av_aelem:
+            S_append_padvar(aTHX_ (++items)->pad_offset, cv, out, 1, 0, 1);
+            goto do_vivify_rv2xv_elem;
+            NOT_REACHED; /* NOTREACHED */
+
+        case MDEREF_HV_pop_rv2hv_helem:
+        case MDEREF_HV_vivify_rv2hv_helem:
+            is_hash = TRUE;
+            /* FALLTHROUGH */
+        do_vivify_rv2xv_elem:
+        case MDEREF_AV_pop_rv2av_aelem:
+        case MDEREF_AV_vivify_rv2av_aelem:
+            if (!derefs++)
+                sv_catpvs_nomg(out, "->");
+        do_elem:
+            if ((actions & MDEREF_INDEX_MASK)== MDEREF_INDEX_none) {
+                sv_catpvs_nomg(out, "->");
+                last = 1;
+                break;
+            }
+
+            sv_catpvn_nomg(out, (is_hash ? "{" : "["), 1);
+            switch (actions & MDEREF_INDEX_MASK) {
+            case MDEREF_INDEX_const:
+                if (is_hash) {
+                    items++;
+                    sv = ITEM_SV(items);
+                    if (!sv)
+                        sv_catpvs_nomg(out, "???");
+                    else {
+                        STRLEN cur;
+                        char *s;
+                        s = SvPV(sv, cur);
+                        pv_pretty(out, s, cur, 30,
+                                    NULL, NULL,
+                                    (PERL_PV_PRETTY_NOCLEAR
+                                    |PERL_PV_PRETTY_QUOTE
+                                    |PERL_PV_PRETTY_ELLIPSES));
+                    }
+                }
+                else
+                    Perl_sv_catpvf(aTHX_ out, "%" IVdf, (++items)->iv);
+                break;
+            case MDEREF_INDEX_padsv:
+                S_append_padvar(aTHX_ (++items)->pad_offset, cv, out, 1, 0, 1);
+                break;
+            case MDEREF_INDEX_gvsv:
+                items++;
+                sv = ITEM_SV(items);
+                S_append_gv_name(aTHX_ (GV*)sv, out);
+                break;
+            }
+            sv_catpvn_nomg(out, (is_hash ? "}" : "]"), 1);
+
+            if (actions & MDEREF_FLAG_last)
+                last = 1;
+            is_hash = FALSE;
+
+            break;
+
+        default:
+            PerlIO_printf(Perl_debug_log, "UNKNOWN(%d)",
+                (int)(actions & MDEREF_ACTION_MASK));
+            last = 1;
+            break;
+
+        } /* switch */
+
+        actions >>= MDEREF_SHIFT;
+    } /* while */
+    return out;
+}
+
+
 I32
 Perl_debop(pTHX_ const OP *o)
 {
-    int count;
-
     PERL_ARGS_ASSERT_DEBOP;
 
     if (CopSTASH_eq(PL_curcop, PL_debstash) && !DEBUG_J_TEST_)
@@ -2262,12 +2521,20 @@ Perl_debop(pTHX_ const OP *o)
        break;
     case OP_GVSV:
     case OP_GV:
-       if (cGVOPo_gv) {
+       if (cGVOPo_gv && isGV(cGVOPo_gv)) {
            SV * const sv = newSV(0);
            gv_fullname3(sv, cGVOPo_gv, NULL);
            PerlIO_printf(Perl_debug_log, "(%s)", SvPV_nolen_const(sv));
            SvREFCNT_dec_NN(sv);
        }
+       else if (cGVOPo_gv) {
+           SV * const sv = newSV(0);
+           assert(SvROK(cGVOPo_gv));
+           assert(SvTYPE(SvRV(cGVOPo_gv)) == SVt_PVCV);
+           PerlIO_printf(Perl_debug_log, "(cv ref: %s)",
+                   SvPV_nolen_const(cv_name((CV *)SvRV(cGVOPo_gv),sv,0)));
+           SvREFCNT_dec_NN(sv);
+       }
        else
            PerlIO_printf(Perl_debug_log, "(NULL)");
        break;
@@ -2275,35 +2542,18 @@ Perl_debop(pTHX_ const OP *o)
     case OP_PADSV:
     case OP_PADAV:
     case OP_PADHV:
-        count = 1;
-        goto dump_padop;
+    case OP_ARGELEM:
+        S_deb_padvar(aTHX_ o->op_targ, 1, 1);
+        break;
+
     case OP_PADRANGE:
-        count = o->op_private & OPpPADRANGE_COUNTMASK;
-    dump_padop:
-       /* print the lexical's name */
-        {
-            CV * const cv = deb_curcv(cxstack_ix);
-            SV *sv;
-            PAD * comppad = NULL;
-            int i;
-
-            if (cv) {
-                PADLIST * const padlist = CvPADLIST(cv);
-                comppad = *PadlistARRAY(padlist);
-            }
-            PerlIO_printf(Perl_debug_log, "(");
-            for (i = 0; i < count; i++) {
-                if (comppad &&
-                        (sv = *av_fetch(comppad, o->op_targ + i, FALSE)))
-                    PerlIO_printf(Perl_debug_log, "%s", SvPV_nolen_const(sv));
-                else
-                    PerlIO_printf(Perl_debug_log, "[%"UVuf"]",
-                            (UV)o->op_targ+i);
-                if (i < count-1)
-                    PerlIO_printf(Perl_debug_log, ",");
-            }
-            PerlIO_printf(Perl_debug_log, ")");
-        }
+        S_deb_padvar(aTHX_ o->op_targ,
+                        o->op_private & OPpPADRANGE_COUNTMASK, 1);
+        break;
+
+    case OP_MULTIDEREF:
+        PerlIO_printf(Perl_debug_log, "(%" SVf ")",
+            SVfARG(multideref_stringify(o, deb_curcv(cxstack_ix))));
         break;
 
     default:
@@ -2313,20 +2563,176 @@ Perl_debop(pTHX_ const OP *o)
     return 0;
 }
 
+
+/*
+=for apidoc op_class
+
+Given an op, determine what type of struct it has been allocated as.
+Returns one of the OPclass enums, such as OPclass_LISTOP.
+
+=cut
+*/
+
+
+OPclass
+Perl_op_class(pTHX_ const OP *o)
+{
+    bool custom = 0;
+
+    if (!o)
+       return OPclass_NULL;
+
+    if (o->op_type == 0) {
+       if (o->op_targ == OP_NEXTSTATE || o->op_targ == OP_DBSTATE)
+           return OPclass_COP;
+       return (o->op_flags & OPf_KIDS) ? OPclass_UNOP : OPclass_BASEOP;
+    }
+
+    if (o->op_type == OP_SASSIGN)
+       return ((o->op_private & OPpASSIGN_BACKWARDS) ? OPclass_UNOP : OPclass_BINOP);
+
+    if (o->op_type == OP_AELEMFAST) {
+#ifdef USE_ITHREADS
+           return OPclass_PADOP;
+#else
+           return OPclass_SVOP;
+#endif
+    }
+    
+#ifdef USE_ITHREADS
+    if (o->op_type == OP_GV || o->op_type == OP_GVSV ||
+       o->op_type == OP_RCATLINE)
+       return OPclass_PADOP;
+#endif
+
+    if (o->op_type == OP_CUSTOM)
+        custom = 1;
+
+    switch (OP_CLASS(o)) {
+    case OA_BASEOP:
+       return OPclass_BASEOP;
+
+    case OA_UNOP:
+       return OPclass_UNOP;
+
+    case OA_BINOP:
+       return OPclass_BINOP;
+
+    case OA_LOGOP:
+       return OPclass_LOGOP;
+
+    case OA_LISTOP:
+       return OPclass_LISTOP;
+
+    case OA_PMOP:
+       return OPclass_PMOP;
+
+    case OA_SVOP:
+       return OPclass_SVOP;
+
+    case OA_PADOP:
+       return OPclass_PADOP;
+
+    case OA_PVOP_OR_SVOP:
+        /*
+         * Character translations (tr///) are usually a PVOP, keeping a 
+         * pointer to a table of shorts used to look up translations.
+         * Under utf8, however, a simple table isn't practical; instead,
+         * the OP is an SVOP (or, under threads, a PADOP),
+         * and the SV is a reference to a swash
+         * (i.e., an RV pointing to an HV).
+         */
+       return (!custom &&
+                  (o->op_private & (OPpTRANS_TO_UTF|OPpTRANS_FROM_UTF))
+              )
+#if  defined(USE_ITHREADS)
+               ? OPclass_PADOP : OPclass_PVOP;
+#else
+               ? OPclass_SVOP : OPclass_PVOP;
+#endif
+
+    case OA_LOOP:
+       return OPclass_LOOP;
+
+    case OA_COP:
+       return OPclass_COP;
+
+    case OA_BASEOP_OR_UNOP:
+       /*
+        * UNI(OP_foo) in toke.c returns token UNI or FUNC1 depending on
+        * whether parens were seen. perly.y uses OPf_SPECIAL to
+        * signal whether a BASEOP had empty parens or none.
+        * Some other UNOPs are created later, though, so the best
+        * test is OPf_KIDS, which is set in newUNOP.
+        */
+       return (o->op_flags & OPf_KIDS) ? OPclass_UNOP : OPclass_BASEOP;
+
+    case OA_FILESTATOP:
+       /*
+        * The file stat OPs are created via UNI(OP_foo) in toke.c but use
+        * the OPf_REF flag to distinguish between OP types instead of the
+        * usual OPf_SPECIAL flag. As usual, if OPf_KIDS is set, then we
+        * return OPclass_UNOP so that walkoptree can find our children. If
+        * OPf_KIDS is not set then we check OPf_REF. Without OPf_REF set
+        * (no argument to the operator) it's an OP; with OPf_REF set it's
+        * an SVOP (and op_sv is the GV for the filehandle argument).
+        */
+       return ((o->op_flags & OPf_KIDS) ? OPclass_UNOP :
+#ifdef USE_ITHREADS
+               (o->op_flags & OPf_REF) ? OPclass_PADOP : OPclass_BASEOP);
+#else
+               (o->op_flags & OPf_REF) ? OPclass_SVOP : OPclass_BASEOP);
+#endif
+    case OA_LOOPEXOP:
+       /*
+        * next, last, redo, dump and goto use OPf_SPECIAL to indicate that a
+        * label was omitted (in which case it's a BASEOP) or else a term was
+        * seen. In this last case, all except goto are definitely PVOP but
+        * goto is either a PVOP (with an ordinary constant label), an UNOP
+        * with OPf_STACKED (with a non-constant non-sub) or an UNOP for
+        * OP_REFGEN (with goto &sub) in which case OPf_STACKED also seems to
+        * get set.
+        */
+       if (o->op_flags & OPf_STACKED)
+           return OPclass_UNOP;
+       else if (o->op_flags & OPf_SPECIAL)
+           return OPclass_BASEOP;
+       else
+           return OPclass_PVOP;
+    case OA_METHOP:
+       return OPclass_METHOP;
+    case OA_UNOP_AUX:
+       return OPclass_UNOP_AUX;
+    }
+    Perl_warn(aTHX_ "Can't determine class of operator %s, assuming BASEOP\n",
+        OP_NAME(o));
+    return OPclass_BASEOP;
+}
+
+
+
 STATIC CV*
-S_deb_curcv(pTHX_ const I32 ix)
+S_deb_curcv(pTHX_ I32 ix)
 {
-    const PERL_CONTEXT * const cx = &cxstack[ix];
-    if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT)
-        return cx->blk_sub.cv;
-    else if (CxTYPE(cx) == CXt_EVAL && !CxTRYBLOCK(cx))
-        return cx->blk_eval.cv;
-    else if (ix == 0 && PL_curstackinfo->si_type == PERLSI_MAIN)
-        return PL_main_cv;
-    else if (ix <= 0)
-        return NULL;
-    else
-        return deb_curcv(ix - 1);
+    PERL_SI *si = PL_curstackinfo;
+    for (; ix >=0; ix--) {
+        const PERL_CONTEXT * const cx = &(si->si_cxstack)[ix];
+
+        if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT)
+            return cx->blk_sub.cv;
+        else if (CxTYPE(cx) == CXt_EVAL && !CxTRYBLOCK(cx))
+            return cx->blk_eval.cv;
+        else if (ix == 0 && si->si_type == PERLSI_MAIN)
+            return PL_main_cv;
+        else if (ix == 0 && CxTYPE(cx) == CXt_NULL
+               && si->si_type == PERLSI_SORT)
+        {
+            /* fake sort sub; use CV of caller */
+            si = si->si_prev;
+            ix = si->si_cxix + 1;
+        }
+    }
+    return NULL;
 }
 
 void
@@ -2336,7 +2742,7 @@ Perl_watch(pTHX_ char **addr)
 
     PL_watchaddr = addr;
     PL_watchok = *addr;
-    PerlIO_printf(Perl_debug_log, "WATCHING, %"UVxf" is currently %"UVxf"\n",
+    PerlIO_printf(Perl_debug_log, "WATCHING, %" UVxf " is currently %" UVxf "\n",
        PTR2UV(PL_watchaddr), PTR2UV(PL_watchok));
 }
 
@@ -2368,11 +2774,5 @@ Perl_debprofdump(pTHX)
 
 
 /*
- * Local variables:
- * c-indentation-style: bsd
- * c-basic-offset: 4
- * indent-tabs-mode: nil
- * End:
- *
  * ex: set ts=8 sts=4 sw=4 et:
  */