From 17fa0776055c3d6ef5e8451cfcb9e194ca912faa Mon Sep 17 00:00:00 2001
From: Rafael Garcia-Suarez <rgarciasuarez@gmail.com>
Date: Thu, 14 Jun 2007 11:06:02 +0000
Subject: [PATCH] Fix [perl #43207] lc() or uc() inside sort affect the return
 value.

p4raw-id: //depot/perl@31377
---
 pp.c      | 6 +++---
 t/op/lc.t | 9 ++++++++-
 2 files changed, 11 insertions(+), 4 deletions(-)

diff --git a/pp.c b/pp.c
index 830d5fb..51af7d8 100644
--- a/pp.c
+++ b/pp.c
@@ -3522,7 +3522,7 @@ PP(pp_ucfirst)
 	need = slen + 1;
     }
 
-    if (SvPADTMP(source) && !SvREADONLY(source) && inplace) {
+    if (SvPADTMP(source) && !SvREADONLY(source) && inplace && SvTEMP(source)) {
 	/* We can convert in place.  */
 
 	dest = source;
@@ -3605,7 +3605,7 @@ PP(pp_uc)
     SvGETMAGIC(source);
 
     if (SvPADTMP(source) && !SvREADONLY(source) && !SvAMAGIC(source)
-	&& !DO_UTF8(source)) {
+	&& SvTEMP(source) && !DO_UTF8(source)) {
 	/* We can convert in place.  */
 
 	dest = source;
@@ -3705,7 +3705,7 @@ PP(pp_lc)
     SvGETMAGIC(source);
 
     if (SvPADTMP(source) && !SvREADONLY(source) && !SvAMAGIC(source)
-	&& !DO_UTF8(source)) {
+	&& SvTEMP(source) && !DO_UTF8(source)) {
 	/* We can convert in place.  */
 
 	dest = source;
diff --git a/t/op/lc.t b/t/op/lc.t
index 571868f..1cef380 100644
--- a/t/op/lc.t
+++ b/t/op/lc.t
@@ -6,7 +6,7 @@ BEGIN {
     require './test.pl';
 }
 
-plan tests => 87;
+plan tests => 88;
 
 $a = "HELLO.* world";
 $b = "hello.* WORLD";
@@ -205,3 +205,10 @@ for (1, 4, 9, 16, 25) {
 
     is(lc "\x{0130}" x $_, "i\x{307}" x $_, 'lc U+0130 grows');
 }
+
+# bug #43207
+my $temp = "Hello";
+for ("$temp") {
+    lc $_;
+    is($_, "Hello");
+}
-- 
2.7.4