fix smart match docs for lhs undef

[perl5.git] / perlio.c

diff --git a/perlio.c b/perlio.c
index 6a092d0..e42a78f 100644 (file)
--- a/perlio.c
+++ b/perlio.c
@@ -1963,7 +1963,7 @@ PERLIO_FUNCS_DECL(PerlIO_utf8) = {
     sizeof(PerlIO_funcs),
     "utf8",
     0,
-    PERLIO_K_DUMMY | PERLIO_K_UTF8,
+    PERLIO_K_DUMMY | PERLIO_K_UTF8 | PERLIO_K_MULTIARG,
     PerlIOUtf8_pushed,
     NULL,
     PerlIOBase_open,
@@ -1994,7 +1994,7 @@ PERLIO_FUNCS_DECL(PerlIO_byte) = {
     sizeof(PerlIO_funcs),
     "bytes",
     0,
-    PERLIO_K_DUMMY,
+    PERLIO_K_DUMMY | PERLIO_K_MULTIARG,
     PerlIOUtf8_pushed,
     NULL,
     PerlIOBase_open,
@@ -2412,6 +2412,7 @@ PerlIOUnix_refcnt_inc(int fd)
 
        PL_perlio_fd_refcnt[fd]++;
        if (PL_perlio_fd_refcnt[fd] <= 0) {
+           /* diag_listed_as: refcnt_inc: fd %d%s */
            Perl_croak(aTHX_ "refcnt_inc: fd %d: %d <= 0\n",
                       fd, PL_perlio_fd_refcnt[fd]);
        }
@@ -2422,6 +2423,7 @@ PerlIOUnix_refcnt_inc(int fd)
        MUTEX_UNLOCK(&PL_perlio_mutex);
 #endif
     } else {
+       /* diag_listed_as: refcnt_inc: fd %d%s */
        Perl_croak(aTHX_ "refcnt_inc: fd %d < 0\n", fd);
     }
 }
@@ -2437,10 +2439,12 @@ PerlIOUnix_refcnt_dec(int fd)
        MUTEX_LOCK(&PL_perlio_mutex);
 #endif
        if (fd >= PL_perlio_fd_refcnt_size) {
+           /* diag_listed_as: refcnt_dec: fd %d%s */
            Perl_croak(aTHX_ "refcnt_dec: fd %d >= refcnt_size %d\n",
                       fd, PL_perlio_fd_refcnt_size);
        }
        if (PL_perlio_fd_refcnt[fd] <= 0) {
+           /* diag_listed_as: refcnt_dec: fd %d%s */
            Perl_croak(aTHX_ "refcnt_dec: fd %d: %d <= 0\n",
                       fd, PL_perlio_fd_refcnt[fd]);
        }
@@ -2450,6 +2454,7 @@ PerlIOUnix_refcnt_dec(int fd)
        MUTEX_UNLOCK(&PL_perlio_mutex);
 #endif
     } else {
+       /* diag_listed_as: refcnt_dec: fd %d%s */
        Perl_croak(aTHX_ "refcnt_dec: fd %d < 0\n", fd);
     }
     return cnt;
@@ -4539,10 +4544,8 @@ PerlIOCrlf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
                 PerlIOBase(f)->flags);
 #endif
     {
-      /* Enable the first CRLF capable layer you can find, but if none
-       * found, the one we just pushed is fine.  This results in at
-       * any given moment at most one CRLF-capable layer being enabled
-       * in the whole layer stack. */
+      /* If the old top layer is a CRLF layer, reactivate it (if
+       * necessary) and remove this new layer from the stack */
         PerlIO *g = PerlIONext(f);
         if (PerlIOValid(g)) {
              PerlIOl *b = PerlIOBase(g);