1 files changed, 26 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/basic/bug763440.js b/js/src/jit-test/tests/basic/bug763440.js
new file mode 100644
index 0000000000..babc4f5ab0
--- /dev/null
+++ b/js/src/jit-test/tests/basic/bug763440.js
@@ -0,0 +1,26 @@
+load(libdir + "immutable-prototype.js");
+
+var summary = '';
+var actual = '';
+gcPreserveCode()
+function TestCase(n, d, e, a) {
+  this.name=n;
+}
+function reportCompare (expected, actual, description) {
+  new TestCase
+}
+reportCompare(true, eval++, "Dummy description.");
+var p = new Proxy({}, {
+    has : function(id) {},
+    set : function() {}
+});
+if (globalPrototypeChainIsMutable())
+    Object.prototype.__proto__ = p;
+new TestCase;
+var expect = '';
+reportCompare(expect, actual, summary);
+gczeal(4);
+try {
+  evalcx(".");
+} catch (e) {}
+reportCompare(expect, actual, summary);