1 files changed, 45 insertions, 0 deletions
diff --git a/js/src/tests/test262/annexB/built-ins/RegExp/prototype/compile/flags-to-string-err.js b/js/src/tests/test262/annexB/built-ins/RegExp/prototype/compile/flags-to-string-err.js
new file mode 100644
index 0000000000..1fad177bd1
--- /dev/null
+++ b/js/src/tests/test262/annexB/built-ins/RegExp/prototype/compile/flags-to-string-err.js
@@ -0,0 +1,45 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-regexp.prototype.compile
+es6id: B.2.5.1
+description: Behavior when provided flags cannot be coerced to a string
+info: |
+    [...]
+    3. If Type(pattern) is Object and pattern has a [[RegExpMatcher]] internal
+       slot, then
+       a. If flags is not undefined, throw a TypeError exception.
+       b. Let P be the value of pattern's [[OriginalSource]] internal slot.
+       c. Let F be the value of pattern's [[OriginalFlags]] internal slot.
+    4. Else,
+       [...]
+    5. Return ? RegExpInitialize(O, P, F).
+
+    21.2.3.2.2 Runtime Semantics: RegExpInitialize
+
+    [...]
+    3. If flags is undefined, let F be the empty String.
+    4. Else, let F be ? ToString(flags).
+features: [Symbol]
+---*/
+
+var symbol = Symbol('');
+var subject = /./;
+var badToString = {
+  toString: function() {
+    throw new Test262Error();
+  }
+};
+subject.lastIndex = 99;
+
+assert.throws(Test262Error, function() {
+  /./.compile('', badToString);
+});
+
+assert.throws(TypeError, function() {
+  /./.compile('', symbol);
+});
+
+assert.sameValue(subject.lastIndex, 99);
+
+reportCompare(0, 0);