1 files changed, 20 insertions, 0 deletions
diff --git a/js/src/tests/Intl/getCanonicalLocales-overridden-arg-length.js b/js/src/tests/Intl/getCanonicalLocales-overridden-arg-length.js
new file mode 100644
index 000000000..f0cb3d4ee
--- /dev/null
+++ b/js/src/tests/Intl/getCanonicalLocales-overridden-arg-length.js
@@ -0,0 +1,20 @@
+// |reftest| skip-if(!this.hasOwnProperty("Intl"))
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+// Tests the getCanonicalLocales function for overridden argument's length.
+
+var count = 0;
+var locs = { get length() { if (count++ > 0) throw 42; return 0; } };
+var locales = Intl.getCanonicalLocales(locs); // shouldn't throw 42
+assertEq(locales.length, 0);
+
+
+var obj = { get 0() { throw new Error("must not be gotten!"); },
+            length: -Math.pow(2, 32) + 1 };
+
+assertEq(Intl.getCanonicalLocales(obj).length, 0);
+
+if (typeof reportCompare === 'function')
+    reportCompare(0, 0);