Fix [perl #43207] lc() or uc() inside sort affect the return value.

p4raw-id: //depot/perl@31377

1 files changed, 8 insertions, 1 deletions

diff --git a/t/op/lc.t b/t/op/lc.t
index 571868fe02..1cef380417 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");
+}