[perl #15397] seems to have been fixed; add its test.

p4raw-id: //depot/perl@18630

diff --git a/t/op/pat.t b/t/op/pat.t
index 7a324db..7386f26 100755 (executable)
--- a/t/op/pat.t
+++ b/t/op/pat.t
@@ -6,7 +6,7 @@
 
 $| = 1;
 
-print "1..972\n";
+print "1..977\n";
 
 BEGIN {
     chdir 't' if -d 't';
@@ -3061,4 +3061,11 @@ ok(/[^\d]+/, "m/[^\d]/ utf8");
 ok(($a = $_, $_ =~ s/[^\s]+/./g), "s/[^\s]/ utf8");
 ok(($a = $_, $a =~ s/[^\d]+/./g), "s/[^\s]/ utf8");
 
-# last test 972
+ok("\x{100}" =~ /\x{100}/, "[perl #15397]");
+ok("\x{100}" =~ /(\x{100})/, "[perl #15397]");
+ok("\x{100}" =~ /(\x{100}){1}/, "[perl #15397]");
+ok("\x{100}\x{100}" =~ /(\x{100}){2}/, "[perl #15397]");
+ok("\x{100}\x{100}" =~ /(\x{100})(\x{100})/, "[perl #15397]");
+
+# last test 977
+