1 files changed, 41 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/String/prototype/trimEnd/this-value-object-toprimitive-returns-object-err.js b/js/src/tests/test262/built-ins/String/prototype/trimEnd/this-value-object-toprimitive-returns-object-err.js
new file mode 100644
index 0000000000..7405357aec
--- /dev/null
+++ b/js/src/tests/test262/built-ins/String/prototype/trimEnd/this-value-object-toprimitive-returns-object-err.js
@@ -0,0 +1,41 @@
+// Copyright (C) 2017 Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-string.prototype.trimEnd
+description: >
+    Abrupt completion when Symbol.toPrimitive returns an object
+info: |
+  Runtime Semantics: TrimString ( string, where )
+  1. Let str be ? RequireObjectCoercible(string).
+  2. Let S be ? ToString(str).
+   ...
+
+  ToString ( argument )
+  If arguement is Object:
+    1. Let primValue be ? ToPrimitive(argument, hint String).
+   ...
+
+  ToPrimitive ( input [, PreferredType ])
+   ...
+    d. Let exoticToPrim be ? GetMethod(input, @@toPrimitive).
+    e. If exoticToPrim is not undefined, then
+      i. Let result be ? Call(exoticToPrim, input, « hint »).
+      ii. If Type(result) is not Object, return result.
+      iii. Throw a TypeError exception.
+   ...
+features: [string-trimming, String.prototype.trimEnd, Symbol.toPrimitive]
+---*/
+
+var thisVal = {
+  [Symbol.toPrimitive]: function() {
+    return {};
+  },
+};
+
+assert.sameValue(typeof String.prototype.trimEnd, 'function');
+assert.throws(TypeError, function() {
+  String.prototype.trimEnd.call(thisVal);
+});
+
+reportCompare(0, 0);