add a test cases

diff --git a/test/test_utf8.c b/test/test_utf8.c
index b8550f2cc50e0b8b2fabfbd8a23cc6b1a6542fa9..21acff8fdf4af20a209efc4a00026a0dcf81306f 100644 (file)
--- a/test/test_utf8.c
+++ b/test/test_utf8.c
@@ -1207,6 +1207,7 @@ extern int main(int argc, char* argv[])
 
   x2("((?(a)\\g<1>|b))", "aab", 0, 3);
   x2("((?(a)\\g<1>))", "aab", 0, 2);
+  x2("(b(?(a)|\\g<1>))", "bba", 0, 3);
 
   n("   \xfd", ""); /* https://bugs.php.net/bug.php?id=77370 */
   /* can't use \xfc00.. because compiler error: hex escape sequence out of range */