--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/nashorn/script/basic/NASHORN-637.js.EXPECTED	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,8 @@
+/(?:[^[#\s\\]+|\\(?:[\S\s]|$)|\[\^?]?(?:[^\\\]]+|\\(?:[\S\s]|$))*]?)+|(\s*#[^\n\r\u2028\u2029]*\s*|\s+)([?*+]|{[0-9]+(?:,[0-9]*)?})?/g
+/{[0-9]+}?/g
+{123}
+{a}
+f{a}
+f
+SyntaxError
+SyntaxError