Stop sv_force_normal from crashing on ro globs under old cow

This allows t/lib/universal.t to pass under PERL_OLD_COPY_ON_WRITE.

diff --git a/sv.c b/sv.c
index 774154c..01ef3df 100644 (file)
--- a/sv.c
+++ b/sv.c
@@ -4720,7 +4720,7 @@ Perl_sv_force_normal_flags(pTHX_ register SV *const sv, const U32 flags)
 
 #ifdef PERL_OLD_COPY_ON_WRITE
     if (SvREADONLY(sv)) {
-       if (SvFAKE(sv)) {
+       if (SvIsCOW(sv)) {
            const char * const pvx = SvPVX_const(sv);
            const STRLEN len = SvLEN(sv);
            const STRLEN cur = SvCUR(sv);