[perl #8262] //g loops infinitely on tainted data

[p5sagit/p5-mst-13.2.git] / universal.c

diff --git a/universal.c b/universal.c
index 1f63563..824a4d5 100644 (file)
--- a/universal.c
+++ b/universal.c
@@ -38,7 +38,7 @@ S_isa_lookup(pTHX_ HV *stash, const char *name, HV* name_stash,
     AV* av;
     GV* gv;
     GV** gvp;
-    HV* hv = Nullhv;
+    HV* hv = NULL;
     SV* subgen = Nullsv;
     const char *hvname;
 
@@ -141,7 +141,7 @@ bool
 Perl_sv_derived_from(pTHX_ SV *sv, const char *name)
 {
     const char *type = Nullch;
-    HV *stash = Nullhv;
+    HV *stash = NULL;
     HV *name_stash;
 
     SvGETMAGIC(sv);
@@ -850,7 +850,7 @@ XS(XS_PerlIO_get_layers)
        if (!isGV(sv)) {
             if (SvROK(sv) && isGV(SvRV(sv)))
                  gv = (GV*)SvRV(sv);
-            else
+            else if (SvPOKp(sv))
                  gv = gv_fetchsv(sv, FALSE, SVt_PVIO);
        }