1 files changed, 10 insertions, 0 deletions
diff --git a/js/src/tests/ecma_6/WeakMap/symbols.js b/js/src/tests/ecma_6/WeakMap/symbols.js
new file mode 100644
index 000000000..68d6518f2
--- /dev/null
+++ b/js/src/tests/ecma_6/WeakMap/symbols.js
@@ -0,0 +1,10 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/ */
+
+// Symbols can't be WeakMap keys.
+var m = new WeakMap;
+var sym = Symbol();
+assertThrowsInstanceOf(() => m.set(sym, 0), TypeError);
+
+if (typeof reportCompare === "function")
+  reportCompare(0, 0);