hv_delete_common was freeing the key, then passing the freed pointer

[perl5.git] / hv.c

diff --git a/hv.c b/hv.c
index 28c04de..627140b 100644 (file)
--- a/hv.c
+++ b/hv.c
@@ -1,7 +1,7 @@
 /*    hv.c
  *
  *    Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
- *    2000, 2001, 2002, 2003, by Larry Wall and others
+ *    2000, 2001, 2002, 2003, 2004, by Larry Wall and others
  *
  *    You may distribute under the terms of either the GNU General Public
  *    License or the Artistic License, as specified in the README file.
@@ -977,19 +977,21 @@ S_hv_delete_common(pTHX_ HV *hv, SV *keysv, const char *key, STRLEN klen,
            continue;
        if ((HeKFLAGS(entry) ^ masked_flags) & HVhek_UTF8)
            continue;
-        if (k_flags & HVhek_FREEKEY)
-            Safefree(key);
 
        /* if placeholder is here, it's already been deleted.... */
        if (HeVAL(entry) == &PL_sv_placeholder)
        {
-           return Nullsv;
+         if (k_flags & HVhek_FREEKEY)
+            Safefree(key);
+         return Nullsv;
        }
        else if (SvREADONLY(hv) && HeVAL(entry) && SvREADONLY(HeVAL(entry))) {
            S_hv_notallowed(aTHX_ k_flags, key, klen,
                            "delete readonly key '%"SVf"' from"
                            );
        }
+        if (k_flags & HVhek_FREEKEY)
+            Safefree(key);
 
        if (d_flags & G_DISCARD)
            sv = Nullsv;
@@ -1038,11 +1040,6 @@ S_hv_delete_common(pTHX_ HV *hv, SV *keysv, const char *key, STRLEN klen,
 STATIC void
 S_hsplit(pTHX_ HV *hv)
 {
-    /* Can't make this clear any placeholders first for non-restricted hashes,
-       as Storable rebuilds restricted hashes by putting in all the
-       placeholders (first) before turning on the readonly flag.  Hence midway
-       through restoring the hash there are placeholders which need to remain
-       even though the hash isn't (currently) flagged as restricted. */
     register XPVHV* xhv = (XPVHV*)SvANY(hv);
     I32 oldsize = (I32) xhv->xhv_max+1; /* HvMAX(hv)+1 (sick) */
     register I32 newsize = oldsize * 2;
@@ -1055,6 +1052,17 @@ S_hsplit(pTHX_ HV *hv)
     int longest_chain = 0;
     int was_shared;
 
+    /*PerlIO_printf(PerlIO_stderr(), "hsplit called for %p which had %d\n",
+      hv, (int) oldsize);*/
+
+    if (HvPLACEHOLDERS(hv) && !SvREADONLY(hv)) {
+      /* Can make this clear any placeholders first for non-restricted hashes,
+        even though Storable rebuilds restricted hashes by putting in all the
+        placeholders (first) before turning on the readonly flag, because
+        Storable always pre-splits the hash.  */
+      hv_clear_placeholders(hv);
+    }
+              
     PL_nomemok = TRUE;
 #if defined(STRANGE_MALLOC) || defined(MYMALLOC)
     Renew(a, PERL_HV_ARRAY_ALLOC_BYTES(newsize), char);