add a test case

diff --git a/test/test_utf8.c b/test/test_utf8.c
index a185b987f089db8bbae69177d1639b6c20a31666..02aa06bea25fdba3b0b05ee14bccb886bd49d9be 100644 (file)
--- a/test/test_utf8.c
+++ b/test/test_utf8.c
@@ -625,6 +625,7 @@ extern int main(int argc, char* argv[])
   x2("(?:()|())*\\2", "abc", 0, 0);
   x2("(?:()|()|())*\\3\\1", "abc", 0, 0);
   x2("(|(?:a(?:\\g'1')*))b|", "abc", 0, 2);
+  x2("^(\"|)(.*)\\1$", "XX", 0, 2);
 
   x2("(?~)", "", 0, 0);
   x2("(?~)", "A", 0, 0);