Free iterator when freeing tied hash

The current iterator was leaking when a tied hash was freed or
undefined.

Since we already have a mechanism, namely HvLAZYDEL, for freeing
HvEITER when not referenced elsewhere, we can use that.

1 files changed, 3 insertions, 0 deletions

diff --git a/hv.c b/hv.c
index 36b70382da..14f3399a3e 100644
--- a/hv.c
+++ b/hv.c
@@ -2370,6 +2370,7 @@ Perl_hv_iternext_flags(pTHX_ HV *hv, I32 flags)
             if (entry) {
                 sv_setsv(key, HeSVKEY_force(entry));
                 SvREFCNT_dec(HeSVKEY(entry));       /* get rid of previous key */
+		HeSVKEY_set(entry, NULL);
             }
             else {
                 char *k;
@@ -2377,6 +2378,7 @@ Perl_hv_iternext_flags(pTHX_ HV *hv, I32 flags)
 
                 /* one HE per MAGICAL hash */
                 iter->xhv_eiter = entry = new_HE(); /* HvEITER(hv) = new_HE() */
+		HvLAZYDEL_on(hv); /* make sure entry gets freed */
                 Zero(entry, 1, HE);
                 Newxz(k, HEK_BASESIZE + sizeof(const SV *), char);
                 hek = (HEK*)k;
@@ -2393,6 +2395,7 @@ Perl_hv_iternext_flags(pTHX_ HV *hv, I32 flags)
             Safefree(HeKEY_hek(entry));
             del_HE(entry);
             iter->xhv_eiter = NULL; /* HvEITER(hv) = NULL */
+	    HvLAZYDEL_off(hv);
             return NULL;
         }
     }