Restructure hv_backreferences_p() so assert makes sense

Prior to this patch the assert was meaningless as we would
use the argument before we asserted things about it.

This patch restructures the logic so we do the asserts first
and *then* use the argument.

1 files changed, 4 insertions, 4 deletions

diff --git a/hv.c b/hv.c
index 5bab2d7640..731407093b 100644
--- a/hv.c
+++ b/hv.c
@@ -2447,11 +2447,11 @@ Perl_hv_ename_delete(pTHX_ HV *hv, const char *name, U32 len, U32 flags)
 
 AV **
 Perl_hv_backreferences_p(pTHX_ HV *hv) {
-    struct xpvhv_aux * const iter = SvOOK(hv) ? HvAUX(hv) : hv_auxinit(hv);
-
     PERL_ARGS_ASSERT_HV_BACKREFERENCES_P;
-
-    return &(iter->xhv_backreferences);
+    {
+        struct xpvhv_aux * const iter = SvOOK(hv) ? HvAUX(hv) : hv_auxinit(hv);
+        return &(iter->xhv_backreferences);
+    }
 }
 
 void