1 files changed, 94 insertions, 0 deletions
diff --git a/js/src/tests/non262/expressions/destructuring-object-__proto__-2.js b/js/src/tests/non262/expressions/destructuring-object-__proto__-2.js
new file mode 100644
index 0000000000..36f3e06ebe
--- /dev/null
+++ b/js/src/tests/non262/expressions/destructuring-object-__proto__-2.js
@@ -0,0 +1,94 @@
+// Test __proto__ is destructuring assignment.
+
+// __proto__ shorthand, no default.
+{
+  let __proto__;
+  ({__proto__} = {});
+  assertEq(__proto__, Object.prototype);
+}
+
+// __proto__ shorthand, with default.
+{
+  let __proto__;
+  ({__proto__ = 0} = {});
+  assertEq(__proto__, Object.prototype);
+}
+
+{
+  let __proto__;
+  ({__proto__ = 0} = Object.create(null));
+  assertEq(__proto__, 0);
+}
+
+// __proto__ keyed, no default.
+{
+  let p;
+  ({__proto__: p} = {});
+  assertEq(p, Object.prototype);
+}
+
+// __proto__ keyed, with default.
+{
+  let p;
+  ({__proto__: p = 0} = {});
+  assertEq(p, Object.prototype);
+}
+
+// __proto__ keyed, with default.
+{
+  let p;
+  ({__proto__: p = 0} = Object.create(null));
+  assertEq(p, 0);
+}
+
+// Repeat the cases from above, but this time with a rest property.
+
+// __proto__ shorthand, no default.
+{
+  let __proto__, rest;
+  ({__proto__, ...rest} = {});
+  assertEq(__proto__, Object.prototype);
+  assertEq(Reflect.ownKeys(rest).length, 0);
+}
+
+// __proto__ shorthand, with default.
+{
+  let __proto__, rest;
+  ({__proto__ = 0, ...rest} = {});
+  assertEq(__proto__, Object.prototype);
+  assertEq(Reflect.ownKeys(rest).length, 0);
+}
+
+{
+  let __proto__, rest;
+  ({__proto__ = 0, ...rest} = Object.create(null));
+  assertEq(__proto__, 0);
+  assertEq(Reflect.ownKeys(rest).length, 0);
+}
+
+// __proto__ keyed, no default.
+{
+  let p, rest;
+  ({__proto__: p, ...rest} = {});
+  assertEq(p, Object.prototype);
+  assertEq(Reflect.ownKeys(rest).length, 0);
+}
+
+// __proto__ keyed, with default.
+{
+  let p, rest;
+  ({__proto__: p = 0, ...rest} = {});
+  assertEq(p, Object.prototype);
+  assertEq(Reflect.ownKeys(rest).length, 0);
+}
+
+// __proto__ keyed, with default.
+{
+  let p, rest;
+  ({__proto__: p = 0, ...rest} = Object.create(null));
+  assertEq(p, 0);
+  assertEq(Reflect.ownKeys(rest).length, 0);
+}
+
+if (typeof reportCompare == "function")
+  reportCompare(true, true);