From b9f751c0c83936edb2414f3db711d9aed06f58af Mon Sep 17 00:00:00 2001
From: Gurusamy Sarathy <gsar@cpan.org>
Date: Thu, 22 Nov 2001 03:42:58 +0000
Subject: [PATCH] local(*CORE::GLOBAL::require) doesn't behave like other
 overrides

p4raw-id: //depot/perl@13187
---
 op.c            | 15 +++++++++------
 t/op/override.t | 11 ++++++++++-
 2 files changed, 19 insertions(+), 7 deletions(-)

diff --git a/op.c b/op.c
index 6343a03..edd1ad2 100644
--- a/op.c
+++ b/op.c
@@ -3431,10 +3431,10 @@ Perl_dofile(pTHX_ OP *term)
     GV *gv;
 
     gv = gv_fetchpv("do", FALSE, SVt_PVCV);
-    if (!(gv && GvIMPORTED_CV(gv)))
+    if (!(gv && GvCVu(gv) && GvIMPORTED_CV(gv)))
 	gv = gv_fetchpv("CORE::GLOBAL::do", FALSE, SVt_PVCV);
 
-    if (gv && GvIMPORTED_CV(gv)) {
+    if (gv && GvCVu(gv) && GvIMPORTED_CV(gv)) {
 	doop = ck_subr(newUNOP(OP_ENTERSUB, OPf_STACKED,
 			       append_elem(OP_LIST, term,
 					   scalar(newUNOP(OP_RV2CV, 0,
@@ -5929,8 +5929,11 @@ Perl_ck_glob(pTHX_ OP *o)
     if ((o->op_flags & OPf_KIDS) && !cLISTOPo->op_first->op_sibling)
 	append_elem(OP_GLOB, o, newDEFSVOP());
 
-    if (!((gv = gv_fetchpv("glob", FALSE, SVt_PVCV)) && GvIMPORTED_CV(gv)))
+    if (!((gv = gv_fetchpv("glob", FALSE, SVt_PVCV))
+	  && GvCVu(gv) && GvIMPORTED_CV(gv)))
+    {
 	gv = gv_fetchpv("CORE::GLOBAL::glob", FALSE, SVt_PVCV);
+    }
 
 #if !defined(PERL_EXTERNAL_GLOB)
     /* XXX this can be tightened up and made more failsafe. */
@@ -5948,7 +5951,7 @@ Perl_ck_glob(pTHX_ OP *o)
     }
 #endif /* PERL_EXTERNAL_GLOB */
 
-    if (gv && GvIMPORTED_CV(gv)) {
+    if (gv && GvCVu(gv) && GvIMPORTED_CV(gv)) {
 	append_elem(OP_GLOB, o,
 		    newSVOP(OP_CONST, 0, newSViv(PL_glob_index++)));
 	o->op_type = OP_LIST;
@@ -6259,10 +6262,10 @@ Perl_ck_require(pTHX_ OP *o)
 
     /* handle override, if any */
     gv = gv_fetchpv("require", FALSE, SVt_PVCV);
-    if (!(gv && GvIMPORTED_CV(gv)))
+    if (!(gv && GvCVu(gv) && GvIMPORTED_CV(gv)))
 	gv = gv_fetchpv("CORE::GLOBAL::require", FALSE, SVt_PVCV);
 
-    if (gv && GvIMPORTED_CV(gv)) {
+    if (gv && GvCVu(gv) && GvIMPORTED_CV(gv)) {
 	OP *kid = cUNOPo->op_first;
 	cUNOPo->op_first = 0;
 	op_free(o);
diff --git a/t/op/override.t b/t/op/override.t
index db94ed0..590fcaa 100755
--- a/t/op/override.t
+++ b/t/op/override.t
@@ -6,7 +6,7 @@ BEGIN {
     push @INC, '../lib';
 }
 
-print "1..10\n";
+print "1..11\n";
 
 #
 # This file tries to test builtin override using CORE::GLOBAL
@@ -61,3 +61,12 @@ print "ok 9\n";
 eval "use 5.6";
 print "not " unless $r eq "5.6";
 print "ok 10\n";
+
+# localizing *CORE::GLOBAL::foo should revert to finding CORE::foo
+{
+    local(*CORE::GLOBAL::require);
+    $r = '';
+    eval "require NoNeXiSt;";
+    print "not " if $r or $@ !~ /^Can't locate NoNeXiSt/i;
+    print "ok 11\n";
+}
-- 
2.7.4