{
if (!gv || SvTYPE((SV*)gv) != SVt_PVGV)
Perl_croak(aTHX_ "Bad symbol for filehandle");
- if (!GvIOp(gv))
+ if (!GvIOp(gv)) {
+#ifdef GV_SHARED_CHECK
+ if (GvSHARED(gv)) {
+ Perl_croak(aTHX_ "Bad symbol for filehandle (GV is shared)");
+ }
+#endif
GvIOp(gv) = newIO();
+ }
return gv;
}