ch(dir|mod|own) should not ignore get-magic on glob(ref)s

When the chdir(*handle) feature was added in 5.8.8, the fact that
globs and refs could be magical was not taken into account.

They can easily be magical if a typeglob or reference is returned from
or assigned to a tied variable.

1 files changed, 2 insertions, 2 deletions

diff --git a/pp_sys.c b/pp_sys.c
index ccc4325889..8666a91d13 100644
--- a/pp_sys.c
+++ b/pp_sys.c
@@ -3466,14 +3466,14 @@ PP(pp_chdir)
 	if (PL_op->op_flags & OPf_SPECIAL) {
 	    gv = gv_fetchsv(sv, 0, SVt_PVIO);
 	}
-        else if (isGV_with_GP(sv)) {
+        else if (SvGETMAGIC(sv), isGV_with_GP(sv)) {
 	    gv = MUTABLE_GV(sv);
         }
 	else if (SvROK(sv) && isGV_with_GP(SvRV(sv))) {
             gv = MUTABLE_GV(SvRV(sv));
         }
         else {
-	    tmps = SvPV_nolen_const(sv);
+	    tmps = SvPV_nomg_const_nolen(sv);
 	}
     }