Disallow reference localization targets

[perl/modules/Scope-Upper.git] / Upper.xs

diff --git a/Upper.xs b/Upper.xs
index ba8b7b4a53cf5599d9fb561482f42039d60e4514..75c50934fa9abb290200ffc25dd5a496dde41346 100644 (file)
--- a/Upper.xs
+++ b/Upper.xs
@@ -380,6 +380,9 @@ STATIC void su_ud_localize_init(pTHX_ su_ud_localize *ud, SV *sv, SV *val, SV *e
    t = SvTYPE(SvRV(val));
    deref = 1;
   }
+ } else if (SvROK(sv)) {
+  croak("Invalid %s reference as the localization target",
+                 sv_reftype(SvRV(sv), 0));
  } else {
   STRLEN len, l;
   const char *p = SvPV_const(sv, len), *s;
@@ -1031,11 +1034,17 @@ PREINIT:
  I32 cxix;
  su_ud_localize *ud;
 CODE:
+ if (SvTYPE(sv) >= SVt_PVGV)
+  croak("Can't infer the element localization type from a glob and the value");
  SU_GET_CONTEXT(3, 3);
  Newx(ud, 1, su_ud_localize);
  SU_UD_ORIGIN(ud)  = NULL;
  SU_UD_HANDLER(ud) = su_localize;
  su_ud_localize_init(ud, sv, val, elem);
+ if (ud->type != SVt_PVAV && ud->type != SVt_PVHV) {
+  Safefree(ud);
+  croak("Can't localize an element of something that isn't an array or a hash");
+ }
  su_init(cxix, ud, 4);
 
 void