1 files changed, 44 insertions, 0 deletions
diff --git a/js/src/tests/non262/destructuring/bug1396261.js b/js/src/tests/non262/destructuring/bug1396261.js
new file mode 100644
index 0000000000..5d16b09323
--- /dev/null
+++ b/js/src/tests/non262/destructuring/bug1396261.js
@@ -0,0 +1,44 @@
+// Ensure array or object literals with trailing property accessors are not
+// treated as nested destructuring patterns in assignment destructuring
+// contexts.
+
+// Array destructuring with normal element.
+[{a: 0}.x] = [];
+[[0].x] = [];
+
+// Array destructuring with spread element.
+[...{a: 0}.x] = [];
+[...[0].x] = [];
+
+// Object destructuring with normal property.
+({a: {b: 0}.x} = {});
+({a: [0].x} = {});
+
+// Object destructuring with spread property.
+({...{b: 0}.x} = {});
+({...[0].x} = {});
+
+// Object literal with initializer shorthand in destructuring context.
+assertThrowsInstanceOf(() => Function(`[{a = 0}.x] = [];`), SyntaxError);
+assertThrowsInstanceOf(() => Function(`[...{a = 0}.x] = [];`), SyntaxError);
+assertThrowsInstanceOf(() => Function(`({a: {b = 0}.x} = {});`), SyntaxError);
+assertThrowsInstanceOf(() => Function(`({...{b = 0}.x} = {});`), SyntaxError);
+
+// Object destructuring with "eval" or "arguments" shorthand in strict mode.
+(function() {
+    "use strict";
+
+    // Ensure "eval" resp. "arguments" is not treated as an assignment.
+    [{eval}.x] = [];
+    [...{eval}.x] = [];
+    ({a: {eval}.x} = {});
+    ({...{eval}.x} = {});
+
+    [{arguments}.x] = [];
+    [...{arguments}.x] = [];
+    ({a: {arguments}.x} = {});
+    ({...{arguments}.x} = {});
+})();
+
+if (typeof reportCompare === "function")
+    reportCompare(0, 0);