This is a live mirror of the Perl 5 development currently hosted at https://github.com/perl/perl5
silence warning
[perl5.git] / toke.c
diff --git a/toke.c b/toke.c
index 2eb049f..641e3e3 100644 (file)
--- a/toke.c
+++ b/toke.c
@@ -26,6 +26,8 @@
 #define yylval PL_yylval
 
 static char ident_too_long[] = "Identifier too long";
+static char c_without_g[] = "Use of /c modifier is meaningless without /g";
+static char c_in_subst[] = "Use of /c modifier is meaningless in s///";
 
 static void restore_rsfp(pTHX_ void *f);
 #ifndef PERL_NO_UTF16_FILTER
@@ -39,11 +41,7 @@ static I32 utf16rev_textfilter(pTHX_ int idx, SV *sv, int maxlen);
 #ifdef USE_UTF8_SCRIPTS
 #   define UTF (!IN_BYTES)
 #else
-#   ifdef EBCDIC /* For now 'use utf8' does not affect tokenizer on EBCDIC */
-#       define UTF (PL_linestr && DO_UTF8(PL_linestr))
-#   else
-#       define UTF ((PL_linestr && DO_UTF8(PL_linestr)) || (PL_hints & HINT_UTF8))
-#   endif
+#   define UTF ((PL_linestr && DO_UTF8(PL_linestr)) || (PL_hints & HINT_UTF8))
 #endif
 
 /* In variables named $^X, these are the legal values for X.
@@ -151,7 +149,7 @@ int yyactlevel = -1;
 #define PREREF(retval) return (REPORT2("preref",retval) PL_expect = XREF,PL_bufptr = s,(int)retval)
 #define TERM(retval) return (CLINE, REPORT2("term",retval) PL_expect = XOPERATOR, PL_bufptr = s,(int)retval)
 #define LOOPX(f) return(yylval.ival=f, REPORT("loopx",f) PL_expect = XTERM,PL_bufptr = s,(int)LOOPEX)
-#define FTST(f) return(yylval.ival=f, REPORT("ftst",f) PL_expect = XTERM,PL_bufptr = s,(int)UNIOP)
+#define FTST(f) return(yylval.ival=f, REPORT("ftst",f) PL_expect = XTERMORDORDOR,PL_bufptr = s,(int)UNIOP)
 #define FUN0(f) return(yylval.ival = f, REPORT("fun0",f) PL_expect = XOPERATOR,PL_bufptr = s,(int)FUNC0)
 #define FUN1(f) return(yylval.ival = f, REPORT("fun1",f) PL_expect = XOPERATOR,PL_bufptr = s,(int)FUNC1)
 #define BOop(f) return ao((yylval.ival=f, REPORT("bitorop",f) PL_expect = XTERM,PL_bufptr = s,(int)BITOROP))
@@ -166,14 +164,18 @@ int yyactlevel = -1;
 
 /* This bit of chicanery makes a unary function followed by
  * a parenthesis into a function with one argument, highest precedence.
+ * The UNIDOR macro is for unary functions that can be followed by the //
+ * operator (such as C<shift // 0>).
  */
-#define UNI(f) return(yylval.ival = f, \
+#define UNI2(f,x) return(yylval.ival = f, \
        REPORT("uni",f) \
-       PL_expect = XTERM, \
+       PL_expect = x, \
        PL_bufptr = s, \
        PL_last_uni = PL_oldbufptr, \
        PL_last_lop_op = f, \
        (*s == '(' || (s = skipspace(s), *s == '(') ? (int)FUNC1 : (int)UNIOP) )
+#define UNI(f)    UNI2(f,XTERM)
+#define UNIDOR(f) UNI2(f,XTERMORDORDOR)
 
 #define UNIBRACK(f) return(yylval.ival = f, \
         REPORT("uni",f) \
@@ -209,8 +211,8 @@ S_tokereport(pTHX_ char *thing, char* s, I32 rv)
 /*
  * S_ao
  *
- * This subroutine detects &&= and ||= and turns an ANDAND or OROR
- * into an OP_ANDASSIGN or OP_ORASSIGN
+ * This subroutine detects &&=, ||=, and //= and turns an ANDAND, OROR or DORDOR
+ * into an OP_ANDASSIGN, OP_ORASSIGN, or OP_DORASSIGN
  */
 
 STATIC int
@@ -222,6 +224,8 @@ S_ao(pTHX_ int toketype)
            yylval.ival = OP_ANDASSIGN;
        else if (toketype == OROR)
            yylval.ival = OP_ORASSIGN;
+       else if (toketype == DORDOR)
+           yylval.ival = OP_DORASSIGN;
        toketype = ASSIGNOP;
     }
     return toketype;
@@ -300,7 +304,7 @@ S_missingterm(pTHX_ char *s)
        s = tmpbuf;
     }
     else {
-       *tmpbuf = PL_multi_close;
+       *tmpbuf = (char)PL_multi_close;
        tmpbuf[1] = '\0';
        s = tmpbuf;
     }
@@ -316,7 +320,23 @@ void
 Perl_deprecate(pTHX_ char *s)
 {
     if (ckWARN(WARN_DEPRECATED))
-       Perl_warner(aTHX_ WARN_DEPRECATED, "Use of %s is deprecated", s);
+       Perl_warner(aTHX_ packWARN(WARN_DEPRECATED), "Use of %s is deprecated", s);
+}
+
+void
+Perl_deprecate_old(pTHX_ char *s)
+{
+    /* This function should NOT be called for any new deprecated warnings */
+    /* Use Perl_deprecate instead                                         */
+    /*                                                                    */
+    /* It is here to maintain backward compatibility with the pre-5.8     */
+    /* warnings category hierarchy. The "deprecated" category used to     */
+    /* live under the "syntax" category. It is now a top-level category   */
+    /* in its own right.                                                  */
+
+    if (ckWARN2(WARN_DEPRECATED, WARN_SYNTAX))
+       Perl_warner(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX), 
+                       "Use of %s is deprecated", s);
 }
 
 /*
@@ -327,7 +347,7 @@ Perl_deprecate(pTHX_ char *s)
 STATIC void
 S_depcom(pTHX)
 {
-    deprecate("comma-less variable list");
+    deprecate_old("comma-less variable list");
 }
 
 /*
@@ -404,8 +424,8 @@ Perl_lex_start(pTHX_ SV *line)
     SAVEPPTR(PL_last_uni);
     SAVEPPTR(PL_linestart);
     SAVESPTR(PL_linestr);
-    SAVEPPTR(PL_lex_brackstack);
-    SAVEPPTR(PL_lex_casestack);
+    SAVEGENERICPV(PL_lex_brackstack);
+    SAVEGENERICPV(PL_lex_casestack);
     SAVEDESTRUCTOR_X(restore_rsfp, PL_rsfp);
     SAVESPTR(PL_lex_stuff);
     SAVEI32(PL_lex_defer);
@@ -420,8 +440,6 @@ Perl_lex_start(pTHX_ SV *line)
     PL_lex_brackets = 0;
     New(899, PL_lex_brackstack, 120, char);
     New(899, PL_lex_casestack, 12, char);
-    SAVEFREEPV(PL_lex_brackstack);
-    SAVEFREEPV(PL_lex_casestack);
     PL_lex_casemods = 0;
     *PL_lex_casestack = '\0';
     PL_lex_dojoin = 0;
@@ -436,7 +454,7 @@ Perl_lex_start(pTHX_ SV *line)
     if (SvREADONLY(PL_linestr))
        PL_linestr = sv_2mortal(newSVsv(PL_linestr));
     s = SvPV(PL_linestr, len);
-    if (len && s[len-1] != ';') {
+    if (!len || s[len-1] != ';') {
        if (!(SvFLAGS(PL_linestr) & SVs_TEMP))
            PL_linestr = sv_2mortal(newSVsv(PL_linestr));
        sv_catpvn(PL_linestr, "\n;", 2);
@@ -662,42 +680,13 @@ S_check_uni(pTHX)
     if (ckWARN_d(WARN_AMBIGUOUS)){
         char ch = *s;
         *s = '\0';
-        Perl_warner(aTHX_ WARN_AMBIGUOUS,
+        Perl_warner(aTHX_ packWARN(WARN_AMBIGUOUS),
                   "Warning: Use of \"%s\" without parens is ambiguous",
                   PL_last_uni);
         *s = ch;
     }
 }
 
-/* workaround to replace the UNI() macro with a function.  Only the
- * hints/uts.sh file mentions this.  Other comments elsewhere in the
- * source indicate Microport Unix might need it too.
- */
-
-#ifdef CRIPPLED_CC
-
-#undef UNI
-#define UNI(f) return uni(f,s)
-
-STATIC int
-S_uni(pTHX_ I32 f, char *s)
-{
-    yylval.ival = f;
-    PL_expect = XTERM;
-    PL_bufptr = s;
-    PL_last_uni = PL_oldbufptr;
-    PL_last_lop_op = f;
-    if (*s == '(')
-       return FUNC1;
-    s = skipspace(s);
-    if (*s == '(')
-       return FUNC1;
-    else
-       return UNIOP;
-}
-
-#endif /* CRIPPLED_CC */
-
 /*
  * LOP : macro to build a list operator.  Its behaviour has been replaced
  * with a subroutine, S_lop() for which LOP is just another name.
@@ -722,7 +711,7 @@ S_lop(pTHX_ I32 f, int x, char *s)
     PL_expect = x;
     PL_bufptr = s;
     PL_last_lop = PL_oldbufptr;
-    PL_last_lop_op = f;
+    PL_last_lop_op = (OPCODE)f;
     if (PL_nexttoke)
        return LSTOP;
     if (*s == '(')
@@ -1010,6 +999,9 @@ S_sublex_start(pTHX)
        }
        yylval.opval = (OP*)newSVOP(op_type, 0, sv);
        PL_lex_stuff = Nullsv;
+       /* Allow <FH> // "foo" */
+       if (op_type == OP_READLINE)
+           PL_expect = XTERMORDORDOR;
        return THING;
     }
 
@@ -1058,8 +1050,8 @@ S_sublex_push(pTHX)
     SAVEPPTR(PL_last_uni);
     SAVEPPTR(PL_linestart);
     SAVESPTR(PL_linestr);
-    SAVEPPTR(PL_lex_brackstack);
-    SAVEPPTR(PL_lex_casestack);
+    SAVEGENERICPV(PL_lex_brackstack);
+    SAVEGENERICPV(PL_lex_casestack);
 
     PL_linestr = PL_lex_stuff;
     PL_lex_stuff = Nullsv;
@@ -1074,13 +1066,11 @@ S_sublex_push(pTHX)
     PL_lex_brackets = 0;
     New(899, PL_lex_brackstack, 120, char);
     New(899, PL_lex_casestack, 12, char);
-    SAVEFREEPV(PL_lex_brackstack);
-    SAVEFREEPV(PL_lex_casestack);
     PL_lex_casemods = 0;
     *PL_lex_casestack = '\0';
     PL_lex_starts = 0;
     PL_lex_state = LEX_INTERPCONCAT;
-    CopLINE_set(PL_curcop, PL_multi_start);
+    CopLINE_set(PL_curcop, (line_t)PL_multi_start);
 
     PL_lex_inwhat = PL_sublex_info.sub_inwhat;
     if (PL_lex_inwhat == OP_MATCH || PL_lex_inwhat == OP_QR || PL_lex_inwhat == OP_SUBST)
@@ -1192,7 +1182,7 @@ S_sublex_done(pTHX)
   It stops processing as soon as it finds an embedded $ or @ variable
   and leaves it to the caller to work out what's going on.
 
-  @ in pattern could be: @foo, @{foo}, @$foo, @'foo, @:foo.
+  @ in pattern could be: @foo, @{foo}, @$foo, @'foo, @::foo.
 
   $ in pattern could be $foo or could be tail anchor.  Assumption:
   it's a tail anchor if $ is the last thing in the string, or if it's
@@ -1279,7 +1269,7 @@ S_scan_const(pTHX_ char *start)
 
                 if (min > max) {
                    Perl_croak(aTHX_
-                              "Invalid [] range \"%c-%c\" in transliteration operator",
+                              "Invalid range \"%c-%c\" in transliteration operator",
                               (char)min, (char)max);
                 }
 
@@ -1299,7 +1289,7 @@ S_scan_const(pTHX_ char *start)
                else
 #endif
                    for (i = min; i <= max; i++)
-                       *d++ = i;
+                       *d++ = (char)i;
 
                /* mark the range as done, and continue */
                dorange = FALSE;
@@ -1367,7 +1357,7 @@ S_scan_const(pTHX_ char *start)
        }
 
        /* check for embedded arrays
-          (@foo, @:foo, @'foo, @{foo}, @$foo, @+, @-)
+          (@foo, @::foo, @'foo, @{foo}, @$foo, @+, @-)
           */
        else if (*s == '@' && s[1]
                 && (isALNUM_lazy_if(s+1,UTF) || strchr(":'{$+-", s[1])))
@@ -1401,7 +1391,7 @@ S_scan_const(pTHX_ char *start)
                isDIGIT(*s) && *s != '0' && !isDIGIT(s[1]))
            {
                if (ckWARN(WARN_SYNTAX))
-                   Perl_warner(aTHX_ WARN_SYNTAX, "\\%c better written as $%c", *s, *s);
+                   Perl_warner(aTHX_ packWARN(WARN_SYNTAX), "\\%c better written as $%c", *s, *s);
                *--s = '$';
                break;
            }
@@ -1427,7 +1417,7 @@ S_scan_const(pTHX_ char *start)
                    if (ckWARN(WARN_MISC) &&
                        isALNUM(*s) && 
                        *s != '_')
-                       Perl_warner(aTHX_ WARN_MISC,
+                       Perl_warner(aTHX_ packWARN(WARN_MISC),
                               "Unrecognized escape \\%c passed through",
                               *s);
                    /* default action is to copy the quoted character */
@@ -1507,8 +1497,8 @@ S_scan_const(pTHX_ char *start)
                            while (src >= (U8 *)SvPVX(sv)) {
                                if (!NATIVE_IS_INVARIANT(*src)) {
                                    U8 ch = NATIVE_TO_ASCII(*src);
-                                   *dst-- = UTF8_EIGHT_BIT_LO(ch);
-                                   *dst-- = UTF8_EIGHT_BIT_HI(ch);
+                                   *dst-- = (U8)UTF8_EIGHT_BIT_LO(ch);
+                                   *dst-- = (U8)UTF8_EIGHT_BIT_HI(ch);
                                }
                                else {
                                    *dst-- = *src;
@@ -1551,13 +1541,30 @@ S_scan_const(pTHX_ char *start)
                        e = s - 1;
                        goto cont_scan;
                    }
+                   if (e > s + 2 && s[1] == 'U' && s[2] == '+') {
+                       /* \N{U+...} */
+                       I32 flags = PERL_SCAN_ALLOW_UNDERSCORES |
+                         PERL_SCAN_DISALLOW_PREFIX;
+                       s += 3;
+                       len = e - s;
+                       uv = grok_hex(s, &len, &flags, NULL);
+                       s = e + 1;
+                       goto NUM_ESCAPE_INSERT;
+                   }
                    res = newSVpvn(s + 1, e - s - 1);
                    res = new_constant( Nullch, 0, "charnames",
                                        res, Nullsv, "\\N{...}" );
                    if (has_utf8)
                        sv_utf8_upgrade(res);
                    str = SvPV(res,len);
-#ifdef EBCDIC
+#ifdef EBCDIC_NEVER_MIND
+                   /* charnames uses pack U and that has been
+                    * recently changed to do the below uni->native
+                    * mapping, so this would be redundant (and wrong,
+                    * the code point would be doubly converted).
+                    * But leave this in just in case the pack U change
+                    * gets revoked, but the semantics is still
+                    * desireable for charnames. --jhi */
                    {
                         UV uv = utf8_to_uvchr((U8*)str, 0);
 
@@ -1577,11 +1584,11 @@ S_scan_const(pTHX_ char *start)
                        *d = '\0';
                        sv_utf8_upgrade(sv);
                        /* this just broke our allocation above... */
-                       SvGROW(sv, send - start);
+                       SvGROW(sv, (STRLEN)(send - start));
                        d = SvPVX(sv) + SvCUR(sv);
                        has_utf8 = TRUE;
                    }
-                   if (len > e - s + 4) { /* I _guess_ 4 is \N{} --jhi */
+                   if (len > (STRLEN)(e - s + 4)) { /* I _guess_ 4 is \N{} --jhi */
                        char *odest = SvPVX(sv);
 
                        SvGROW(sv, (SvLEN(sv) + len - (e - s + 4)));
@@ -1600,7 +1607,7 @@ S_scan_const(pTHX_ char *start)
            /* \c is a control character */
            case 'c':
                s++;
-               {
+               if (s < send) {
                    U8 c = *s++;
 #ifdef EBCDIC
                    if (isLOWER(c))
@@ -1608,6 +1615,9 @@ S_scan_const(pTHX_ char *start)
 #endif
                    *d++ = NATIVE_TO_NEED(has_utf8,toCTRL(c));
                }
+               else {
+                   yyerror("Missing control char name in \\c");
+               }
                continue;
 
            /* printf-style backslashes, formfeeds, newlines, etc */
@@ -1663,17 +1673,18 @@ S_scan_const(pTHX_ char *start)
     *d = '\0';
     SvCUR_set(sv, d - SvPVX(sv));
     if (SvCUR(sv) >= SvLEN(sv))
-      Perl_croak(aTHX_ "panic: constant overflowed allocated space");
+       Perl_croak(aTHX_ "panic: constant overflowed allocated space");
 
     SvPOK_on(sv);
     if (PL_encoding && !has_utf8) {
-        Perl_sv_recode_to_utf8(aTHX_ sv, PL_encoding);
-        has_utf8 = TRUE;
+       sv_recode_to_utf8(sv, PL_encoding);
+       if (SvUTF8(sv))
+           has_utf8 = TRUE;
     }
     if (has_utf8) {
        SvUTF8_on(sv);
        if (PL_lex_inwhat == OP_TRANS && PL_sublex_info.sub_op) {
-               PL_sublex_info.sub_op->op_private |=
+           PL_sublex_info.sub_op->op_private |=
                    (PL_lex_repl ? OPpTRANS_FROM_UTF : OPpTRANS_TO_UTF);
        }
     }
@@ -1868,7 +1879,7 @@ S_intuit_more(pTHX_ register char *s)
  * Method if it's "foo $bar"
  * Not a method if it's really "print foo $bar"
  * Method if it's really "foo package::" (interpreted as package->foo)
- * Not a method if bar is known to be a subroutne ("sub bar; foo bar")
+ * Not a method if bar is known to be a subroutine ("sub bar; foo bar")
  * Not a method if bar is a filehandle or package, but is quoted with
  *   =>
  */
@@ -1952,7 +1963,7 @@ S_incl_perldb(pTHX)
 
        if (pdb)
            return pdb;
-       SETERRNO(0,SS$_NORMAL);
+       SETERRNO(0,SS_NORMAL);
        return "BEGIN { require 'perl5db.pl' }";
     }
     return "";
@@ -2043,7 +2054,7 @@ Perl_filter_read(pTHX_ int idx, SV *buf_sv, int maxlen)
            int old_len = SvCUR(buf_sv) ;
 
            /* ensure buf_sv is large enough */
-           SvGROW(buf_sv, old_len + maxlen) ;
+           SvGROW(buf_sv, (STRLEN)(old_len + maxlen)) ;
            if ((len = PerlIO_read(PL_rsfp, SvPVX(buf_sv) + old_len, maxlen)) <= 0){
                if (PerlIO_error(PL_rsfp))
                    return -1;          /* error */
@@ -2193,6 +2204,7 @@ Perl_yylex(pTHX)
     GV *gv = Nullgv;
     GV **gvp = 0;
     bool bof = FALSE;
+    I32 orig_keyword = 0;
 
     /* check if there's an identifier for us to look at */
     if (PL_pending_ident)
@@ -2255,7 +2267,7 @@ Perl_yylex(pTHX)
               "### Saw case modifier at '%s'\n", PL_bufptr); });
            s = PL_bufptr + 1;
            if (strnEQ(s, "L\\u", 3) || strnEQ(s, "U\\l", 3))
-               tmp = *s, *s = s[2], s[2] = tmp;        /* misordered... */
+               tmp = *s, *s = s[2], s[2] = (char)tmp;  /* misordered... */
            if (strchr("LU", *s) &&
                (strchr(PL_lex_casestack, 'L') || strchr(PL_lex_casestack, 'U')))
            {
@@ -2263,11 +2275,7 @@ Perl_yylex(pTHX)
                return ')';
            }
            if (PL_lex_casemods > 10) {
-               char* newlb = Renew(PL_lex_casestack, PL_lex_casemods + 2, char);
-               if (newlb != PL_lex_casestack) {
-                   SAVEFREEPV(newlb);
-                   PL_lex_casestack = newlb;
-               }
+               Renew(PL_lex_casestack, PL_lex_casemods + 2, char);
            }
            PL_lex_casestack[PL_lex_casemods++] = *s;
            PL_lex_casestack[PL_lex_casemods] = '\0';
@@ -2311,13 +2319,7 @@ Perl_yylex(pTHX)
        if (PL_lex_dojoin) {
            PL_nextval[PL_nexttoke].ival = 0;
            force_next(',');
-#ifdef USE_5005THREADS
-           PL_nextval[PL_nexttoke].opval = newOP(OP_THREADSV, 0);
-           PL_nextval[PL_nexttoke].opval->op_targ = find_threadsv("\"");
-           force_next(PRIVATEREF);
-#else
            force_ident("\"", '$');
-#endif /* USE_5005THREADS */
            PL_nextval[PL_nexttoke].ival = 0;
            force_next('$');
            PL_nextval[PL_nexttoke].ival = 0;
@@ -2539,7 +2541,7 @@ Perl_yylex(pTHX)
                if (!PL_preprocess)
                    bof = PerlIO_tell(PL_rsfp) == SvCUR(PL_linestr);
 #else
-               bof = PerlIO_tell(PL_rsfp) == SvCUR(PL_linestr);
+               bof = PerlIO_tell(PL_rsfp) == (Off_t)SvCUR(PL_linestr);
 #endif
                if (bof) {
                    PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
@@ -2547,9 +2549,6 @@ Perl_yylex(pTHX)
                }
            }
            if (PL_doextract) {
-               if (*s == '#' && s[1] == '!' && instr(s,"perl"))
-                   PL_doextract = FALSE;
-
                /* Incest with pod. */
                if (*s == '=' && strnEQ(s, "=cut", 4)) {
                    sv_setpv(PL_linestr, "");
@@ -2615,6 +2614,19 @@ Perl_yylex(pTHX)
                        sv_setpvn(x, ipath, ipathend - ipath);
                        SvSETMAGIC(x);
                    }
+                   else {
+                       STRLEN blen;
+                       STRLEN llen;
+                       char *bstart = SvPV(CopFILESV(PL_curcop),blen);
+                       char *lstart = SvPV(x,llen);
+                       if (llen < blen) {
+                           bstart += blen - llen;
+                           if (strnEQ(bstart, lstart, llen) && bstart[-1] == '/') {
+                               sv_setpvn(x, ipath, ipathend - ipath);
+                               SvSETMAGIC(x);
+                           }
+                       }
+                   }
                    TAINT_NOT;  /* $^X is always tainted, but that's OK */
                }
 #endif /* ARG_ZERO_IS_SCRIPT */
@@ -2837,7 +2849,7 @@ Perl_yylex(pTHX)
                break;
            }
            if (ftst) {
-               PL_last_lop_op = ftst;
+               PL_last_lop_op = (OPCODE)ftst;
                DEBUG_T( { PerlIO_printf(Perl_debug_log,
                         "### Saw file test %c\n", (int)ftst);
                } );
@@ -2967,6 +2979,7 @@ Perl_yylex(pTHX)
                    switch (tmp) {
                    case KEY_or:
                    case KEY_and:
+                   case KEY_err:
                    case KEY_for:
                    case KEY_unless:
                    case KEY_if:
@@ -2999,6 +3012,8 @@ Perl_yylex(pTHX)
                    PL_lex_stuff = Nullsv;
                }
                else {
+                   /* NOTE: any CV attrs applied here need to be part of
+                      the CVf_BUILTIN_ATTRS define in cv.h! */
                    if (!PL_in_my && len == 6 && strnEQ(s, "lvalue", len))
                        CvLVALUE_on(PL_compcv);
                    else if (!PL_in_my && len == 6 && strnEQ(s, "locked", len))
@@ -3006,14 +3021,20 @@ Perl_yylex(pTHX)
                    else if (!PL_in_my && len == 6 && strnEQ(s, "method", len))
                        CvMETHOD_on(PL_compcv);
 #ifdef USE_ITHREADS
-      else if (PL_in_my == KEY_our && len == 6 && strnEQ(s, "unique", len))
+                   else if (PL_in_my == KEY_our && len == 6 &&
+                            strnEQ(s, "unique", len))
                        GvUNIQUE_on(cGVOPx_gv(yylval.opval));
 #endif
                    /* After we've set the flags, it could be argued that
                       we don't need to do the attributes.pm-based setting
                       process, and shouldn't bother appending recognized
-                      flags. To experiment with that, uncomment the
-                      following "else": */
+                      flags.  To experiment with that, uncomment the
+                      following "else".  (Note that's already been
+                      uncommented.  That keeps the above-applied built-in
+                      attributes from being intercepted (and possibly
+                      rejected) by a package's attribute routines, but is
+                      justified by the performance win for the common case
+                      of applying only built-in attributes.) */
                    else
                        attrs = append_elem(OP_LIST, attrs,
                                            newSVOP(OP_CONST, 0,
@@ -3026,7 +3047,7 @@ Perl_yylex(pTHX)
                    break;      /* require real whitespace or :'s */
            }
            tmp = (PL_expect == XOPERATOR ? '=' : '{'); /*'}(' for vi */
-           if (*s != ';' && *s != tmp && (tmp != '=' || *s != ')')) {
+           if (*s != ';' && *s != '}' && *s != tmp && (tmp != '=' || *s != ')')) {
                char q = ((*s == '\'') ? '"' : '\'');
                /* If here for an expression, and parsed no attrs, back off. */
                if (tmp == '=' && !attrs) {
@@ -3088,11 +3109,7 @@ Perl_yylex(pTHX)
       leftbracket:
        s++;
        if (PL_lex_brackets > 100) {
-           char* newlb = Renew(PL_lex_brackstack, PL_lex_brackets + 1, char);
-           if (newlb != PL_lex_brackstack) {
-               SAVEFREEPV(newlb);
-               PL_lex_brackstack = newlb;
-           }
+           Renew(PL_lex_brackstack, PL_lex_brackets + 10, char);
        }
        switch (PL_expect) {
        case XTERM:
@@ -3281,7 +3298,7 @@ Perl_yylex(pTHX)
                && isIDFIRST_lazy_if(s,UTF) && PL_bufptr == PL_linestart)
            {
                CopLINE_dec(PL_curcop);
-               Perl_warner(aTHX_ WARN_SEMICOLON, PL_warn_nosemi);
+               Perl_warner(aTHX_ packWARN(WARN_SEMICOLON), PL_warn_nosemi);
                CopLINE_inc(PL_curcop);
            }
            BAop(OP_BIT_AND);
@@ -3314,7 +3331,7 @@ Perl_yylex(pTHX)
        if (tmp == '~')
            PMop(OP_MATCH);
        if (ckWARN(WARN_SYNTAX) && tmp && isSPACE(*s) && strchr("+-*/%.^&|<",tmp))
-           Perl_warner(aTHX_ WARN_SYNTAX, "Reversed %c= operator",(int)tmp);
+           Perl_warner(aTHX_ packWARN(WARN_SYNTAX), "Reversed %c= operator",(int)tmp);
        s--;
        if (PL_expect == XSTATE && isALPHA(tmp) &&
                (s == PL_linestart+1 || s[-2] == '\n') )
@@ -3458,7 +3475,7 @@ Perl_yylex(pTHX)
                        PL_bufptr = skipspace(PL_bufptr);
                        while (t < PL_bufend && *t != ']')
                            t++;
-                       Perl_warner(aTHX_ WARN_SYNTAX,
+                       Perl_warner(aTHX_ packWARN(WARN_SYNTAX),
                                "Multidimensional syntax %.*s not supported",
                                (t - PL_bufptr) + 1, PL_bufptr);
                    }
@@ -3476,7 +3493,7 @@ Perl_yylex(pTHX)
                        t = scan_word(t, tmpbuf, sizeof tmpbuf, TRUE, &len);
                        for (; isSPACE(*t); t++) ;
                        if (*t == ';' && get_cv(tmpbuf, FALSE))
-                           Perl_warner(aTHX_ WARN_SYNTAX,
+                           Perl_warner(aTHX_ packWARN(WARN_SYNTAX),
                                "You need to quote \"%s\"", tmpbuf);
                    }
                }
@@ -3522,8 +3539,11 @@ Perl_yylex(pTHX)
                PL_expect = XTERM;              /* e.g. print $fh 3 */
            else if (*s == '.' && isDIGIT(s[1]))
                PL_expect = XTERM;              /* e.g. print $fh .3 */
-           else if (strchr("/?-+", *s) && !isSPACE(s[1]) && s[1] != '=')
-               PL_expect = XTERM;              /* e.g. print $fh -1 */
+           else if (strchr("?-+", *s) && !isSPACE(s[1]) && s[1] != '=')
+               PL_expect = XTERM;              /* e.g. print $fh -1 */
+           else if (*s == '/' && !isSPACE(s[1]) && s[1] != '=' && s[1] != '/')
+               PL_expect = XTERM;              /* e.g. print $fh /.../
+                                                XXX except DORDOR operator */
            else if (*s == '<' && s[1] == '<' && !isSPACE(s[2]) && s[2] != '=')
                PL_expect = XTERM;              /* print $fh <<"EOF" */
        }
@@ -3555,7 +3575,7 @@ Perl_yylex(pTHX)
                    if (*t == '}' || *t == ']') {
                        t++;
                        PL_bufptr = skipspace(PL_bufptr);
-                       Perl_warner(aTHX_ WARN_SYNTAX,
+                       Perl_warner(aTHX_ packWARN(WARN_SYNTAX),
                            "Scalar value %.*s better written as $%.*s",
                            t-PL_bufptr, PL_bufptr, t-PL_bufptr-1, PL_bufptr+1);
                    }
@@ -3565,22 +3585,40 @@ Perl_yylex(pTHX)
        PL_pending_ident = '@';
        TERM('@');
 
-    case '/':                  /* may either be division or pattern */
-    case '?':                  /* may either be conditional or pattern */
-       if (PL_expect != XOPERATOR) {
-           /* Disable warning on "study /blah/" */
-           if (PL_oldoldbufptr == PL_last_uni
-               && (*PL_last_uni != 's' || s - PL_last_uni < 5
-                   || memNE(PL_last_uni, "study", 5)
-                   || isALNUM_lazy_if(PL_last_uni+5,UTF)))
-               check_uni();
-           s = scan_pat(s,OP_MATCH);
-           TERM(sublex_start());
-       }
-       tmp = *s++;
-       if (tmp == '/')
-           Mop(OP_DIVIDE);
-       OPERATOR(tmp);
+     case '/':                 /* may be division, defined-or, or pattern */
+       if (PL_expect == XTERMORDORDOR && s[1] == '/') {
+           s += 2;
+           AOPERATOR(DORDOR);
+       }
+     case '?':                 /* may either be conditional or pattern */
+        if(PL_expect == XOPERATOR) {
+            tmp = *s++;
+            if(tmp == '?') {
+                 OPERATOR('?');
+            }
+             else {
+                tmp = *s++;
+                if(tmp == '/') {
+                    /* A // operator. */
+                   AOPERATOR(DORDOR);
+                }
+                else {
+                    s--;
+                    Mop(OP_DIVIDE);
+                }
+            }
+        }
+        else {
+            /* Disable warning on "study /blah/" */
+            if (PL_oldoldbufptr == PL_last_uni
+             && (*PL_last_uni != 's' || s - PL_last_uni < 5
+                 || memNE(PL_last_uni, "study", 5)
+                 || isALNUM_lazy_if(PL_last_uni+5,UTF)
+             ))
+                check_uni();
+            s = scan_pat(s,OP_MATCH);
+            TERM(sublex_start());
+        }
 
     case '.':
        if (PL_lex_formbrack && PL_lex_brackets == PL_lex_formbrack
@@ -3682,7 +3720,7 @@ Perl_yylex(pTHX)
     case '\\':
        s++;
        if (ckWARN(WARN_SYNTAX) && PL_lex_inwhat && isDIGIT(*s))
-           Perl_warner(aTHX_ WARN_SYNTAX,"Can't use \\%c to mean $%c in expression",
+           Perl_warner(aTHX_ packWARN(WARN_SYNTAX),"Can't use \\%c to mean $%c in expression",
                        *s, *s);
        if (PL_expect == XOPERATOR)
            no_op("Backslash",s);
@@ -3700,7 +3738,9 @@ Perl_yylex(pTHX)
                TERM(THING);
            }
            /* avoid v123abc() or $h{v1}, allow C<print v10;> */
-           else if (!isALPHA(*start) && (PL_expect == XTERM || PL_expect == XREF || PL_expect == XSTATE)) {
+           else if (!isALPHA(*start) && (PL_expect == XTERM
+                       || PL_expect == XREF || PL_expect == XSTATE
+                       || PL_expect == XTERMORDORDOR)) {
                char c = *start;
                GV *gv;
                *start = '\0';
@@ -3749,6 +3789,7 @@ Perl_yylex(pTHX)
     case 'z': case 'Z':
 
       keylookup: {
+       orig_keyword = 0;
        gv = Nullgv;
        gvp = 0;
 
@@ -3813,6 +3854,7 @@ Perl_yylex(pTHX)
                }
            }
            if (ogv) {
+               orig_keyword = tmp;
                tmp = 0;                /* overridden by import or by GLOBAL */
            }
            else if (gv && !gvp
@@ -3825,14 +3867,14 @@ Perl_yylex(pTHX)
            else {                      /* no override */
                tmp = -tmp;
                if (tmp == KEY_dump && ckWARN(WARN_MISC)) {
-                   Perl_warner(aTHX_ WARN_MISC,
+                   Perl_warner(aTHX_ packWARN(WARN_MISC),
                            "dump() better written as CORE::dump()");
                }
                gv = Nullgv;
                gvp = 0;
                if (ckWARN(WARN_AMBIGUOUS) && hgv
                    && tmp != KEY_x && tmp != KEY_CORE) /* never ambiguous */
-                   Perl_warner(aTHX_ WARN_AMBIGUOUS,
+                   Perl_warner(aTHX_ packWARN(WARN_AMBIGUOUS),
                        "Ambiguous call resolved as CORE::%s(), %s",
                         GvENAME(hgv), "qualify as such or use &");
            }
@@ -3863,7 +3905,7 @@ Perl_yylex(pTHX)
                if (PL_expect == XOPERATOR) {
                    if (PL_bufptr == PL_linestart) {
                        CopLINE_dec(PL_curcop);
-                       Perl_warner(aTHX_ WARN_SEMICOLON, PL_warn_nosemi);
+                       Perl_warner(aTHX_ packWARN(WARN_SEMICOLON), PL_warn_nosemi);
                        CopLINE_inc(PL_curcop);
                    }
                    else
@@ -3878,7 +3920,7 @@ Perl_yylex(pTHX)
                    PL_tokenbuf[len - 2] == ':' && PL_tokenbuf[len - 1] == ':')
                {
                    if (ckWARN(WARN_BAREWORD) && ! gv_fetchpv(PL_tokenbuf, FALSE, SVt_PVHV))
-                       Perl_warner(aTHX_ WARN_BAREWORD,
+                       Perl_warner(aTHX_ packWARN(WARN_BAREWORD),
                            "Bareword \"%s\" refers to nonexistent package",
                             PL_tokenbuf);
                    len -= 2;
@@ -3906,6 +3948,10 @@ Perl_yylex(pTHX)
                CLINE;
                yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
                yylval.opval->op_private = OPpCONST_BARE;
+               /* UTF-8 package name? */
+               if (UTF && !IN_BYTES &&
+                   is_utf8_string((U8*)SvPVX(sv), SvCUR(sv)))
+                   SvUTF8_on(sv);
 
                /* And if "Foo::", then that's what it certainly is. */
 
@@ -3984,7 +4030,9 @@ Perl_yylex(pTHX)
 
                /* If followed by a bareword, see if it looks like indir obj. */
 
-               if ((isIDFIRST_lazy_if(s,UTF) || *s == '$') && (tmp = intuit_method(s,gv)))
+               if (!orig_keyword
+                       && (isIDFIRST_lazy_if(s,UTF) || *s == '$')
+                       && (tmp = intuit_method(s,gv)))
                    return tmp;
 
                /* Not a method, so call it a subroutine (if defined) */
@@ -3992,7 +4040,7 @@ Perl_yylex(pTHX)
                if (gv && GvCVu(gv)) {
                    CV* cv;
                    if (lastchar == '-' && ckWARN_d(WARN_AMBIGUOUS))
-                       Perl_warner(aTHX_ WARN_AMBIGUOUS,
+                       Perl_warner(aTHX_ packWARN(WARN_AMBIGUOUS),
                                "Ambiguous use of -%s resolved as -&%s()",
                                PL_tokenbuf, PL_tokenbuf);
                    /* Check for a constant sub */
@@ -4020,7 +4068,8 @@ Perl_yylex(pTHX)
                        if (strEQ(proto, "$"))
                            OPERATOR(UNIOPSUB);
                        if (*proto == '&' && *s == '{') {
-                           sv_setpv(PL_subname,"__ANON__");
+                           sv_setpv(PL_subname, PL_curstash ? 
+                                       "__ANON__" : "__ANON__::__ANON__");
                            PREBLOCK(LSTOPSUB);
                        }
                    }
@@ -4039,8 +4088,8 @@ Perl_yylex(pTHX)
                    if (ckWARN(WARN_RESERVED)) {
                        if (lastchar != '-') {
                            for (d = PL_tokenbuf; *d && isLOWER(*d); d++) ;
-                           if (!*d && strNE(PL_tokenbuf,"main"))
-                               Perl_warner(aTHX_ WARN_RESERVED, PL_warn_reserved,
+                           if (!*d && !gv_stashpv(PL_tokenbuf,FALSE))
+                               Perl_warner(aTHX_ packWARN(WARN_RESERVED), PL_warn_reserved,
                                       PL_tokenbuf);
                        }
                    }
@@ -4048,10 +4097,10 @@ Perl_yylex(pTHX)
 
            safe_bareword:
                if (lastchar && strchr("*%&", lastchar) && ckWARN_d(WARN_AMBIGUOUS)) {
-                   Perl_warner(aTHX_ WARN_AMBIGUOUS,
+                   Perl_warner(aTHX_ packWARN(WARN_AMBIGUOUS),
                        "Operator or semicolon missing before %c%s",
                        lastchar, PL_tokenbuf);
-                   Perl_warner(aTHX_ WARN_AMBIGUOUS,
+                   Perl_warner(aTHX_ packWARN(WARN_AMBIGUOUS),
                        "Ambiguous use of %c resolved as operator %c",
                        lastchar, lastchar);
                }
@@ -4291,6 +4340,9 @@ Perl_yylex(pTHX)
        case KEY_eof:
            UNI(OP_EOF);
 
+       case KEY_err:
+           OPERATOR(DOROP);
+
        case KEY_exp:
            UNI(OP_EXP);
 
@@ -4374,7 +4426,7 @@ Perl_yylex(pTHX)
            UNI(OP_GMTIME);
 
        case KEY_getc:
-           UNI(OP_GETC);
+           UNIDOR(OP_GETC);
 
        case KEY_getppid:
            FUN0(OP_GETPPID);
@@ -4589,10 +4641,14 @@ Perl_yylex(pTHX)
                char *t;
                for (d = s; isALNUM_lazy_if(d,UTF); d++) ;
                t = skipspace(d);
-               if (strchr("|&*+-=!?:.", *t) && ckWARN_d(WARN_PRECEDENCE))
-                   Perl_warner(aTHX_ WARN_PRECEDENCE,
+               if (strchr("|&*+-=!?:.", *t) && ckWARN_d(WARN_PRECEDENCE)
+                   /* [perl #16184] */
+                   && !(t[0] == '=' && t[1] == '>')
+               ) {
+                   Perl_warner(aTHX_ packWARN(WARN_PRECEDENCE),
                           "Precedence problem: open %.*s should be open(%.*s)",
-                           d-s,s, d-s,s);
+                           d - s, s, d - s, s);
+               }
            }
            LOP(OP_OPEN,XTERM);
 
@@ -4624,10 +4680,10 @@ Perl_yylex(pTHX)
            LOP(OP_PUSH,XTERM);
 
        case KEY_pop:
-           UNI(OP_POP);
+           UNIDOR(OP_POP);
 
        case KEY_pos:
-           UNI(OP_POS);
+           UNIDOR(OP_POS);
        
        case KEY_pack:
            LOP(OP_PACK,XTERM);
@@ -4666,12 +4722,12 @@ Perl_yylex(pTHX)
                        if (!warned && ckWARN(WARN_QW)) {
                            for (; !isSPACE(*d) && len; --len, ++d) {
                                if (*d == ',') {
-                                   Perl_warner(aTHX_ WARN_QW,
+                                   Perl_warner(aTHX_ packWARN(WARN_QW),
                                        "Possible attempt to separate words with commas");
                                    ++warned;
                                }
                                else if (*d == '#') {
-                                   Perl_warner(aTHX_ WARN_QW,
+                                   Perl_warner(aTHX_ packWARN(WARN_QW),
                                        "Possible attempt to put comments in qw() list");
                                    ++warned;
                                }
@@ -4767,7 +4823,7 @@ Perl_yylex(pTHX)
 
        case KEY_readline:
            set_csh();
-           UNI(OP_READLINE);
+           UNIDOR(OP_READLINE);
 
        case KEY_readpipe:
            set_csh();
@@ -4783,7 +4839,7 @@ Perl_yylex(pTHX)
            LOP(OP_REVERSE,XTERM);
 
        case KEY_readlink:
-           UNI(OP_READLINK);
+           UNIDOR(OP_READLINK);
 
        case KEY_ref:
            UNI(OP_REF);
@@ -4850,7 +4906,7 @@ Perl_yylex(pTHX)
            LOP(OP_SSOCKOPT,XTERM);
 
        case KEY_shift:
-           UNI(OP_SHIFT);
+           UNIDOR(OP_SHIFT);
 
        case KEY_shmctl:
            LOP(OP_SHMCTL,XTERM);
@@ -4980,9 +5036,9 @@ Perl_yylex(pTHX)
                    }
                    d[tmp] = '\0';
                    if (bad_proto && ckWARN(WARN_SYNTAX))
-                       Perl_warner(aTHX_ WARN_SYNTAX,
-                                   "Illegal character in prototype for %s : %s",
-                                   SvPVX(PL_subname), d);
+                       Perl_warner(aTHX_ packWARN(WARN_SYNTAX),
+                                   "Illegal character in prototype for %"SVf" : %s",
+                                   PL_subname, d);
                    SvCUR(PL_lex_stuff) = tmp;
                    have_proto = TRUE;
 
@@ -4993,6 +5049,8 @@ Perl_yylex(pTHX)
 
                if (*s == ':' && s[1] != ':')
                    PL_expect = attrful;
+               else if (!have_name && *s != '{' && key == KEY_sub)
+                   Perl_croak(aTHX_ "Illegal declaration of anonymous subroutine");
 
                if (have_proto) {
                    PL_nextval[PL_nexttoke].opval =
@@ -5001,7 +5059,8 @@ Perl_yylex(pTHX)
                    force_next(THING);
                }
                if (!have_name) {
-                   sv_setpv(PL_subname,"__ANON__");
+                   sv_setpv(PL_subname,
+                       PL_curstash ? "__ANON__" : "__ANON__::__ANON__");
                    TOKEN(ANONSUB);
                }
                (void) force_word(PL_oldbufptr + tboffset, WORD,
@@ -5079,7 +5138,7 @@ Perl_yylex(pTHX)
            LOP(OP_UNLINK,XTERM);
 
        case KEY_undef:
-           UNI(OP_UNDEF);
+           UNIDOR(OP_UNDEF);
 
        case KEY_unpack:
            LOP(OP_UNPACK,XTERM);
@@ -5088,7 +5147,7 @@ Perl_yylex(pTHX)
            LOP(OP_UTIME,XTERM);
 
        case KEY_umask:
-           UNI(OP_UMASK);
+           UNIDOR(OP_UMASK);
 
        case KEY_unshift:
            LOP(OP_UNSHIFT,XTERM);
@@ -5195,14 +5254,14 @@ S_pending_ident(pTHX)
                 yyerror(Perl_form(aTHX_ "No package name allowed for "
                                   "variable %s in \"our\"",
                                   PL_tokenbuf));
-            tmp = pad_allocmy(PL_tokenbuf);
+            tmp = allocmy(PL_tokenbuf);
         }
         else {
             if (strchr(PL_tokenbuf,':'))
                 yyerror(Perl_form(aTHX_ PL_no_myglob,PL_tokenbuf));
 
             yylval.opval = newOP(OP_PADANY, 0);
-            yylval.opval->op_targ = pad_allocmy(PL_tokenbuf);
+            yylval.opval->op_targ = allocmy(PL_tokenbuf);
             return PRIVATEREF;
         }
     }
@@ -5220,23 +5279,11 @@ S_pending_ident(pTHX)
     */
 
     if (!strchr(PL_tokenbuf,':')) {
-#ifdef USE_5005THREADS
-        /* Check for single character per-thread SVs */
-        if (PL_tokenbuf[0] == '$' && PL_tokenbuf[2] == '\0'
-            && !isALPHA(PL_tokenbuf[1]) /* Rule out obvious non-threadsvs */
-            && (tmp = find_threadsv(&PL_tokenbuf[1])) != NOT_IN_PAD)
-        {
-            yylval.opval = newOP(OP_THREADSV, 0);
-            yylval.opval->op_targ = tmp;
-            return PRIVATEREF;
-        }
-#endif /* USE_5005THREADS */
         if ((tmp = pad_findmy(PL_tokenbuf)) != NOT_IN_PAD) {
-            SV *namesv = AvARRAY(PL_comppad_name)[tmp];
             /* might be an "our" variable" */
-            if (SvFLAGS(namesv) & SVpad_OUR) {
+            if (PAD_COMPNAME_FLAGS(tmp) & SVpad_OUR) {
                 /* build ops for a bareword */
-                SV *sym = newSVpv(HvNAME(GvSTASH(namesv)),0);
+                SV *sym = newSVpv(HvNAME(PAD_COMPNAME_OURSTASH(tmp)), 0);
                 sv_catpvn(sym, "::", 2);
                 sv_catpv(sym, PL_tokenbuf+1);
                 yylval.opval = (OP*)newSVOP(OP_CONST, 0, sym);
@@ -5286,7 +5333,7 @@ S_pending_ident(pTHX)
              && ckWARN(WARN_AMBIGUOUS))
         {
             /* Downgraded from fatal to warning 20000522 mjd */
-            Perl_warner(aTHX_ WARN_AMBIGUOUS,
+            Perl_warner(aTHX_ packWARN(WARN_AMBIGUOUS),
                         "Possible unintended interpolation of %s in string",
                          PL_tokenbuf);
         }
@@ -5412,6 +5459,7 @@ Perl_keyword(pTHX_ register char *d, I32 len)
            break;
        case 3:
            if (strEQ(d,"eof"))                 return -KEY_eof;
+           if (strEQ(d,"err"))                 return -KEY_err;
            if (strEQ(d,"exp"))                 return -KEY_exp;
            break;
        case 4:
@@ -5922,7 +5970,7 @@ S_checkcomma(pTHX_ register char *s, char *name, char *what)
            if (*w)
                for (; *w && isSPACE(*w); w++) ;
            if (!*w || !strchr(";|})]oaiuw!=", *w))     /* an advisory hack only... */
-               Perl_warner(aTHX_ WARN_SYNTAX,
+               Perl_warner(aTHX_ packWARN(WARN_SYNTAX),
                            "%s (...) interpreted as function",name);
        }
     }
@@ -6195,7 +6243,7 @@ S_scan_ident(pTHX_ register char *s, register char *send, char *dest, STRLEN des
            if ((*s == '[' || (*s == '{' && strNE(dest, "sub")))) {
                if (ckWARN(WARN_AMBIGUOUS) && keyword(dest, d - dest)) {
                    const char *brack = *s == '[' ? "[...]" : "{...}";
-                   Perl_warner(aTHX_ WARN_AMBIGUOUS,
+                   Perl_warner(aTHX_ packWARN(WARN_AMBIGUOUS),
                        "Ambiguous use of %c{%s%s} resolved to %c%s%s",
                        funny, dest, brack, funny, dest, brack);
                }
@@ -6227,7 +6275,7 @@ S_scan_ident(pTHX_ register char *s, register char *send, char *dest, STRLEN des
                if (ckWARN(WARN_AMBIGUOUS) &&
                    (keyword(dest, d - dest) || get_cv(dest, FALSE)))
                {
-                   Perl_warner(aTHX_ WARN_AMBIGUOUS,
+                   Perl_warner(aTHX_ packWARN(WARN_AMBIGUOUS),
                        "Ambiguous use of %c{%s} resolved to %c%s",
                        funny, dest, funny, dest);
                }
@@ -6244,7 +6292,7 @@ S_scan_ident(pTHX_ register char *s, register char *send, char *dest, STRLEN des
 }
 
 void
-Perl_pmflag(pTHX_ U16 *pmfl, int ch)
+Perl_pmflag(pTHX_ U32* pmfl, int ch)
 {
     if (ch == 'i')
        *pmfl |= PMf_FOLD;
@@ -6283,6 +6331,13 @@ S_scan_pat(pTHX_ char *start, I32 type)
        while (*s && strchr("iogcmsx", *s))
            pmflag(&pm->op_pmflags,*s++);
     }
+    /* issue a warning if /c is specified,but /g is not */
+    if (ckWARN(WARN_REGEXP) && 
+        (pm->op_pmflags & PMf_CONTINUE) && !(pm->op_pmflags & PMf_GLOBAL))
+    {
+        Perl_warner(aTHX_ packWARN(WARN_REGEXP), c_without_g);
+    }
+
     pm->op_pmpermflags = pm->op_pmflags;
 
     PL_lex_op = (OP*)pm;
@@ -6331,6 +6386,12 @@ S_scan_subst(pTHX_ char *start)
            break;
     }
 
+    /* /c is not meaningful with s/// */
+    if (ckWARN(WARN_REGEXP) && (pm->op_pmflags & PMf_CONTINUE))
+    {
+        Perl_warner(aTHX_ packWARN(WARN_REGEXP), c_in_subst);
+    }
+
     if (es) {
        SV *repl;
        PL_sublex_info.super_bufptr = s;
@@ -6436,7 +6497,7 @@ S_scan_heredoc(pTHX_ register char *s)
        else
            term = '"';
        if (!isALNUM_lazy_if(s,UTF))
-           deprecate("bare << to mean <<\"\"");
+           deprecate_old("bare << to mean <<\"\"");
        for (; isALNUM_lazy_if(s,UTF); s++) {
            if (d < e)
                *d++ = *s;
@@ -6507,7 +6568,7 @@ S_scan_heredoc(pTHX_ register char *s)
                CopLINE_inc(PL_curcop);
        }
        if (s >= bufend) {
-           CopLINE_set(PL_curcop, PL_multi_start);
+           CopLINE_set(PL_curcop, (line_t)PL_multi_start);
            missingterm(PL_tokenbuf);
        }
        sv_setpvn(herewas,bufptr,d-bufptr+1);
@@ -6527,7 +6588,7 @@ S_scan_heredoc(pTHX_ register char *s)
                CopLINE_inc(PL_curcop);
        }
        if (s >= PL_bufend) {
-           CopLINE_set(PL_curcop, PL_multi_start);
+           CopLINE_set(PL_curcop, (line_t)PL_multi_start);
            missingterm(PL_tokenbuf);
        }
        sv_setpvn(tmpstr,d+1,s-d);
@@ -6545,7 +6606,7 @@ S_scan_heredoc(pTHX_ register char *s)
     while (s >= PL_bufend) {   /* multiple line string? */
        if (!outer ||
         !(PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = filter_gets(PL_linestr, PL_rsfp, 0))) {
-           CopLINE_set(PL_curcop, PL_multi_start);
+           CopLINE_set(PL_curcop, (line_t)PL_multi_start);
            missingterm(PL_tokenbuf);
        }
        CopLINE_inc(PL_curcop);
@@ -6701,9 +6762,9 @@ S_scan_inputsymbol(pTHX_ char *start)
               add symbol table ops
            */
            if ((tmp = pad_findmy(d)) != NOT_IN_PAD) {
-               SV *namesv = AvARRAY(PL_comppad_name)[tmp];
-               if (SvFLAGS(namesv) & SVpad_OUR) {
-                   SV *sym = sv_2mortal(newSVpv(HvNAME(GvSTASH(namesv)),0));
+               if (PAD_COMPNAME_FLAGS(tmp) & SVpad_OUR) {
+                   SV *sym = sv_2mortal(
+                           newSVpv(HvNAME(PAD_COMPNAME_OURSTASH(tmp)),0));
                    sv_catpvn(sym, "::", 2);
                    sv_catpv(sym, d+1);
                    d = SvPVX(sym);
@@ -6737,7 +6798,8 @@ intro_sym:
                            newUNOP(OP_RV2SV, 0,
                                newGVOP(OP_GV, 0, gv)));
            }
-           PL_lex_op->op_flags |= OPf_SPECIAL;
+           if (!readline_overriden)
+               PL_lex_op->op_flags |= OPf_SPECIAL;
            /* we created the ops in PL_lex_op, so make yylval.ival a null op */
            yylval.ival = OP_NULL;
        }
@@ -6937,7 +6999,7 @@ S_scan_str(pTHX_ char *start, int keep_quoted, int keep_delims)
        if (!PL_rsfp ||
         !(PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = filter_gets(PL_linestr, PL_rsfp, 0))) {
            sv_free(sv);
-           CopLINE_set(PL_curcop, PL_multi_start);
+           CopLINE_set(PL_curcop, (line_t)PL_multi_start);
            return Nullch;
        }
        /* we read a line, so increment our line counter */
@@ -6965,6 +7027,9 @@ S_scan_str(pTHX_ char *start, int keep_quoted, int keep_delims)
        sv_catpvn(sv, s, 1);
     if (has_utf8)
        SvUTF8_on(sv);
+    else if (PL_encoding)
+       sv_recode_to_utf8(sv, PL_encoding);
+
     PL_multi_end = CopLINE(PL_curcop);
     s++;
 
@@ -7074,7 +7139,7 @@ Perl_scan_num(pTHX_ char *start, YYSTYPE* lvalp)
 
            if (*s == '_') {
               if (ckWARN(WARN_SYNTAX))
-                  Perl_warner(aTHX_ WARN_SYNTAX,
+                  Perl_warner(aTHX_ packWARN(WARN_SYNTAX),
                               "Misplaced _ in number");
               lastub = s++;
            }
@@ -7098,7 +7163,7 @@ Perl_scan_num(pTHX_ char *start, YYSTYPE* lvalp)
                /* _ are ignored -- but warned about if consecutive */
                case '_':
                    if (ckWARN(WARN_SYNTAX) && lastub && s == lastub + 1)
-                       Perl_warner(aTHX_ WARN_SYNTAX,
+                       Perl_warner(aTHX_ packWARN(WARN_SYNTAX),
                                    "Misplaced _ in number");
                    lastub = s++;
                    break;
@@ -7141,7 +7206,7 @@ Perl_scan_num(pTHX_ char *start, YYSTYPE* lvalp)
                            overflowed = TRUE;
                            n = (NV) u;
                            if (ckWARN_d(WARN_OVERFLOW))
-                               Perl_warner(aTHX_ WARN_OVERFLOW,
+                               Perl_warner(aTHX_ packWARN(WARN_OVERFLOW),
                                            "Integer overflow in %s number",
                                            base);
                        } else
@@ -7171,13 +7236,13 @@ Perl_scan_num(pTHX_ char *start, YYSTYPE* lvalp)
            /* final misplaced underbar check */
            if (s[-1] == '_') {
                if (ckWARN(WARN_SYNTAX))
-                   Perl_warner(aTHX_ WARN_SYNTAX, "Misplaced _ in number");
+                   Perl_warner(aTHX_ packWARN(WARN_SYNTAX), "Misplaced _ in number");
            }
 
            sv = NEWSV(92,0);
            if (overflowed) {
                if (ckWARN(WARN_PORTABLE) && n > 4294967295.0)
-                   Perl_warner(aTHX_ WARN_PORTABLE,
+                   Perl_warner(aTHX_ packWARN(WARN_PORTABLE),
                                "%s number > %s non-portable",
                                Base, max);
                sv_setnv(sv, n);
@@ -7185,7 +7250,7 @@ Perl_scan_num(pTHX_ char *start, YYSTYPE* lvalp)
            else {
 #if UVSIZE > 4
                if (ckWARN(WARN_PORTABLE) && u > 0xffffffff)
-                   Perl_warner(aTHX_ WARN_PORTABLE,
+                   Perl_warner(aTHX_ packWARN(WARN_PORTABLE),
                                "%s number > %s non-portable",
                                Base, max);
 #endif
@@ -7214,7 +7279,7 @@ Perl_scan_num(pTHX_ char *start, YYSTYPE* lvalp)
            */
            if (*s == '_') {
                if (ckWARN(WARN_SYNTAX) && lastub && s == lastub + 1)
-                   Perl_warner(aTHX_ WARN_SYNTAX,
+                   Perl_warner(aTHX_ packWARN(WARN_SYNTAX),
                                "Misplaced _ in number");
                lastub = s++;
            }
@@ -7230,7 +7295,7 @@ Perl_scan_num(pTHX_ char *start, YYSTYPE* lvalp)
        /* final misplaced underbar check */
        if (lastub && s == lastub + 1) {
            if (ckWARN(WARN_SYNTAX))
-               Perl_warner(aTHX_ WARN_SYNTAX, "Misplaced _ in number");
+               Perl_warner(aTHX_ packWARN(WARN_SYNTAX), "Misplaced _ in number");
        }
 
        /* read a decimal portion if there is one.  avoid
@@ -7243,7 +7308,7 @@ Perl_scan_num(pTHX_ char *start, YYSTYPE* lvalp)
 
            if (*s == '_') {
                if (ckWARN(WARN_SYNTAX))
-                   Perl_warner(aTHX_ WARN_SYNTAX,
+                   Perl_warner(aTHX_ packWARN(WARN_SYNTAX),
                                "Misplaced _ in number");
                lastub = s;
            }
@@ -7256,7 +7321,7 @@ Perl_scan_num(pTHX_ char *start, YYSTYPE* lvalp)
                    Perl_croak(aTHX_ number_too_long);
                if (*s == '_') {
                   if (ckWARN(WARN_SYNTAX) && lastub && s == lastub + 1)
-                      Perl_warner(aTHX_ WARN_SYNTAX,
+                      Perl_warner(aTHX_ packWARN(WARN_SYNTAX),
                                   "Misplaced _ in number");
                   lastub = s;
                }
@@ -7266,7 +7331,7 @@ Perl_scan_num(pTHX_ char *start, YYSTYPE* lvalp)
            /* fractional part ending in underbar? */
            if (s[-1] == '_') {
                if (ckWARN(WARN_SYNTAX))
-                   Perl_warner(aTHX_ WARN_SYNTAX,
+                   Perl_warner(aTHX_ packWARN(WARN_SYNTAX),
                                "Misplaced _ in number");
            }
            if (*s == '.' && isDIGIT(s[1])) {
@@ -7287,7 +7352,7 @@ Perl_scan_num(pTHX_ char *start, YYSTYPE* lvalp)
            /* stray preinitial _ */
            if (*s == '_') {
                if (ckWARN(WARN_SYNTAX))
-                   Perl_warner(aTHX_ WARN_SYNTAX,
+                   Perl_warner(aTHX_ packWARN(WARN_SYNTAX),
                                "Misplaced _ in number");
                lastub = s++;
            }
@@ -7299,7 +7364,7 @@ Perl_scan_num(pTHX_ char *start, YYSTYPE* lvalp)
            /* stray initial _ */
            if (*s == '_') {
                if (ckWARN(WARN_SYNTAX))
-                   Perl_warner(aTHX_ WARN_SYNTAX,
+                   Perl_warner(aTHX_ packWARN(WARN_SYNTAX),
                                "Misplaced _ in number");
                lastub = s++;
            }
@@ -7315,7 +7380,7 @@ Perl_scan_num(pTHX_ char *start, YYSTYPE* lvalp)
                   if (ckWARN(WARN_SYNTAX) &&
                       ((lastub && s == lastub + 1) ||
                        (!isDIGIT(s[1]) && s[1] != '_')))
-                      Perl_warner(aTHX_ WARN_SYNTAX,
+                      Perl_warner(aTHX_ packWARN(WARN_SYNTAX),
                                   "Misplaced _ in number");
                   lastub = s++;
                }
@@ -7366,7 +7431,7 @@ Perl_scan_num(pTHX_ char *start, YYSTYPE* lvalp)
     case 'v':
 vstring:
                sv = NEWSV(92,5); /* preallocate storage space */
-               s = new_vstring(s,sv);
+               s = scan_vstring(s,sv);
        break;
     }
 
@@ -7480,52 +7545,22 @@ Perl_start_subparse(pTHX_ I32 is_format, U32 flags)
 {
     I32 oldsavestack_ix = PL_savestack_ix;
     CV* outsidecv = PL_compcv;
-    AV* comppadlist;
 
     if (PL_compcv) {
        assert(SvTYPE(PL_compcv) == SVt_PVCV);
     }
     SAVEI32(PL_subline);
     save_item(PL_subname);
-    SAVEI32(PL_padix);
-    SAVECOMPPAD();
-    SAVESPTR(PL_comppad_name);
     SAVESPTR(PL_compcv);
-    SAVEI32(PL_comppad_name_fill);
-    SAVEI32(PL_min_intro_pending);
-    SAVEI32(PL_max_intro_pending);
-    SAVEI32(PL_pad_reset_pending);
 
     PL_compcv = (CV*)NEWSV(1104,0);
     sv_upgrade((SV *)PL_compcv, is_format ? SVt_PVFM : SVt_PVCV);
     CvFLAGS(PL_compcv) |= flags;
 
-    PL_comppad = newAV();
-    av_push(PL_comppad, Nullsv);
-    PL_curpad = AvARRAY(PL_comppad);
-    PL_comppad_name = newAV();
-    PL_comppad_name_fill = 0;
-    PL_min_intro_pending = 0;
-    PL_padix = 0;
     PL_subline = CopLINE(PL_curcop);
-#ifdef USE_5005THREADS
-    av_store(PL_comppad_name, 0, newSVpvn("@_", 2));
-    PL_curpad[0] = (SV*)newAV();
-    SvPADMY_on(PL_curpad[0]);  /* XXX Needed? */
-#endif /* USE_5005THREADS */
-
-    comppadlist = newAV();
-    AvREAL_off(comppadlist);
-    av_store(comppadlist, 0, (SV*)PL_comppad_name);
-    av_store(comppadlist, 1, (SV*)PL_comppad);
-
-    CvPADLIST(PL_compcv) = comppadlist;
+    CvPADLIST(PL_compcv) = pad_new(padnew_SAVE|padnew_SAVESUB);
     CvOUTSIDE(PL_compcv) = (CV*)SvREFCNT_inc(outsidecv);
-#ifdef USE_5005THREADS
-    CvOWNER(PL_compcv) = 0;
-    New(666, CvMUTEXP(PL_compcv), 1, perl_mutex);
-    MUTEX_INIT(CvMUTEXP(PL_compcv));
-#endif /* USE_5005THREADS */
+    CvOUTSIDE_SEQ(PL_compcv) = PL_cop_seqmax;
 
     return oldsavestack_ix;
 }
@@ -7554,15 +7589,33 @@ Perl_yyerror(pTHX_ char *s)
        where = "at EOF";
     else if (PL_bufptr > PL_oldoldbufptr && PL_bufptr - PL_oldoldbufptr < 200 &&
       PL_oldoldbufptr != PL_oldbufptr && PL_oldbufptr != PL_bufptr) {
+       /*
+               Only for NetWare:
+               The code below is removed for NetWare because it abends/crashes on NetWare
+               when the script has error such as not having the closing quotes like:
+                   if ($var eq "value)
+               Checking of white spaces is anyway done in NetWare code.
+       */
+#ifndef NETWARE
        while (isSPACE(*PL_oldoldbufptr))
            PL_oldoldbufptr++;
+#endif
        context = PL_oldoldbufptr;
        contlen = PL_bufptr - PL_oldoldbufptr;
     }
     else if (PL_bufptr > PL_oldbufptr && PL_bufptr - PL_oldbufptr < 200 &&
       PL_oldbufptr != PL_bufptr) {
+       /*
+               Only for NetWare:
+               The code below is removed for NetWare because it abends/crashes on NetWare
+               when the script has error such as not having the closing quotes like:
+                   if ($var eq "value)
+               Checking of white spaces is anyway done in NetWare code.
+       */
+#ifndef NETWARE
        while (isSPACE(*PL_oldbufptr))
            PL_oldbufptr++;
+#endif
        context = PL_oldbufptr;
        contlen = PL_bufptr - PL_oldbufptr;
     }