--- /dev/null
+'use strict';
+
+var fails = require('./fails');
+
+// babel-minify transpiles RegExp('a', 'y') -> /a/y and it causes SyntaxError,
+// so we use an intermediate function.
+function RE(s, f) {
+ return RegExp(s, f);
+}
+
+exports.UNSUPPORTED_Y = fails(function () {
+ // babel-minify transpiles RegExp('a', 'y') -> /a/y and it causes SyntaxError
+ var re = RE('a', 'y');
+ re.lastIndex = 2;
+ return re.exec('abcd') != null;
+});
+
+exports.BROKEN_CARET = fails(function () {
+ // https://bugzilla.mozilla.org/show_bug.cgi?id=773687
+ var re = RE('^r', 'gy');
+ re.lastIndex = 2;
+ return re.exec('str') != null;
+});