As the backreferences AV doesn't hold references on its contents,

surely it should have AvREAL turned off?

p4raw-id: //depot/perl@26517

diff --git a/sv.c b/sv.c
index 3b69cb5..d797a9f 100644 (file)
--- a/sv.c
+++ b/sv.c
@@ -4355,6 +4355,7 @@ Perl_sv_add_backref(pTHX_ SV *tsv, SV *sv)
        av = (AV*)mg->mg_obj;
     else {
        av = newAV();
+       AvREAL_off(av);
        sv_magic(tsv, (SV*)av, PERL_MAGIC_backref, NULL, 0);
        /* av now has a refcnt of 2, which avoids it getting freed
         * before us during global cleanup. The extra ref is removed
@@ -8997,6 +8998,7 @@ Perl_mg_dup(pTHX_ MAGIC *mg, CLONE_PARAMS* param)
            SV **svp;
            I32 i;
            (void)SvREFCNT_inc(nmg->mg_obj = (SV*)newAV());
+           AvREAL_off((AV*)nmg->mg_obj);
            svp = AvARRAY(av);
            for (i = AvFILLp(av); i >= 0; i--) {
                if (!svp[i]) continue;