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-rw-r--r--js/src/jit-test/tests/saved-stacks/getters-on-invalid-objects.js23
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diff --git a/js/src/jit-test/tests/saved-stacks/getters-on-invalid-objects.js b/js/src/jit-test/tests/saved-stacks/getters-on-invalid-objects.js
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index 000000000..9a892f20b
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+++ b/js/src/jit-test/tests/saved-stacks/getters-on-invalid-objects.js
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+// Test that you can't call the SavedFrame constructor and can only use
+// SavedFrame's getters on SavedFrame instances.
+
+load(libdir + "asserts.js");
+
+let proto = Object.getPrototypeOf(saveStack());
+
+// Can't create new SavedFrame instances by hand.
+print("Testing constructor");
+assertThrowsInstanceOf(() => {
+ new proto.constructor();
+}, TypeError);
+
+for (let p of ["source", "line", "column", "functionDisplayName", "parent"]) {
+ print("Testing getter: " + p);
+ // The getters shouldn't work on the prototype.
+ assertThrowsInstanceOf(() => proto[p], TypeError);
+
+ // Nor should they work on random objects.
+ let o = {};
+ Object.defineProperty(o, p, Object.getOwnPropertyDescriptor(proto, p));
+ assertThrowsInstanceOf(() => o[p], TypeError);
+}