[win32] merge change#904 from maintbranch

p4raw-link: @904 on //depot/maint-5.004/perl: 0af7994b889ad0dfcacb011f16f9e3c77a9292b9

p4raw-id: //depot/win32/perl@975

1 files changed, 1 insertions, 1 deletions

diff --git a/doop.c b/doop.c
index 11dc837b33..e7c5e359d3 100644
--- a/doop.c
+++ b/doop.c
@@ -106,7 +106,7 @@ do_join(register SV *sv, SV *del, register SV **mark, register SV **sp)
 	sv_upgrade(sv, SVt_PV);
     if (SvLEN(sv) < len + items) {	/* current length is way too short */
 	while (items-- > 0) {
-	    if (*mark) {
+	    if (*mark && !SvGMAGIC(*mark) && SvOK(*mark)) {
 		SvPV(*mark, tmplen);
 		len += tmplen;
 	    }