assert that HvARRAY is NULL when freeing an HV

The code path that leads to HvAUX being empty and thus HvARRAY being
freed, is non-obvious: so put in an assert against any future failure.

1 files changed, 1 insertions, 0 deletions

diff --git a/sv.c b/sv.c
index 7ce4b6d40d..534638c5fe 100644
--- a/sv.c
+++ b/sv.c
@@ -6102,6 +6102,7 @@ Perl_sv_clear(pTHX_ SV *const orig_sv)
 		PL_last_swash_hv = NULL;
 	    }
 	    Perl_hv_undef_flags(aTHX_ MUTABLE_HV(sv), HV_NAME_SETALL);
+	    assert(!HvARRAY((HV*)sv));
 	    break;
 	case SVt_PVAV:
 	    {