substr() does not preserve utf8-ness (from Stefan Eissing

<Eissing@medicaldataservice.de>); added tests

p4raw-id: //depot/perl@6084

1 files changed, 13 insertions, 1 deletions

diff --git a/t/op/substr.t b/t/op/substr.t
index 5764e67e7a..6180acc402 100755
--- a/t/op/substr.t
+++ b/t/op/substr.t
@@ -1,5 +1,5 @@
 
-print "1..125\n";
+print "1..130\n";
 
 #P = start of string  Q = start of substr  R = end of substr  S = end of string
 
@@ -268,3 +268,15 @@ ok 123, $@ && $@ =~ /Can't modify substr/ && $a eq "foo";
 $a = "abcdefgh";
 ok 124, sub { shift }->(substr($a, 0, 4, "xxxx")) eq 'abcd';
 ok 125, $a eq 'xxxxefgh';
+
+# utf8 sanity
+{
+    my $x = substr("a\x{263a}b",0);
+    ok 126, length($x) eq 3;
+    $x = substr($x,1,1);
+    ok 127, $x eq "\x{263a}";
+    ok 128, length($x) eq 1;
+    substr($x,0,1) = "abcd";
+    ok 129, $x eq "abcd";
+    ok 130, length($x) eq 4;
+}