1 files changed, 35 insertions, 0 deletions
diff --git a/js/src/tests/non262/expressions/computed-property-side-effects.js b/js/src/tests/non262/expressions/computed-property-side-effects.js
new file mode 100644
index 0000000000..54dec7416b
--- /dev/null
+++ b/js/src/tests/non262/expressions/computed-property-side-effects.js
@@ -0,0 +1,35 @@
+// Any copyright is dedicated to the Public Domain.
+// http://creativecommons.org/licenses/publicdomain/
+
+//-----------------------------------------------------------------------------
+var BUGNUMBER = 1199695;
+var summary =
+  "Computed property names must be considered as always effectful even when " +
+  "the name expression isn't effectful, because calling ToPropertyKey on " +
+  "some non-effectful expressions has user-modifiable behavior";
+
+print(BUGNUMBER + ": " + summary);
+
+/**************
+ * BEGIN TEST *
+ **************/
+
+RegExp.prototype.toString = () => { throw 42; };
+assertThrowsValue(function() {
+  ({ [/regex/]: 0 }); // ToPropertyKey(/regex/) throws 42
+}, 42);
+
+function Q() {
+  ({ [new.target]: 0 }); // new.target will be Q, ToPropertyKey(Q) throws 17
+}
+Q.toString = () => { throw 17; };
+assertThrowsValue(function() {
+  new Q;
+}, 17);
+
+/******************************************************************************/
+
+if (typeof reportCompare === "function")
+  reportCompare(true, true);
+
+print("Tests complete");