1 files changed, 33 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/parser/bug-889628.js b/js/src/jit-test/tests/parser/bug-889628.js
new file mode 100644
index 000000000..bb337c35d
--- /dev/null
+++ b/js/src/jit-test/tests/parser/bug-889628.js
@@ -0,0 +1,33 @@
+// Destructuring assignment to eval or arguments in destructuring is a SyntaxError
+// in strict mode
+
+load(libdir + "asserts.js");
+
+var patterns = [
+    "[_]",
+    "[a, b, _]",
+    "[[_]]",
+    "[[], [{}, [_]]]",
+    "{x:_}",
+    "{x:y, z:_}",
+    "{0:_}",
+    "{_}",
+    "[..._]"
+];
+
+for (var pattern of patterns) {
+    var stmt = pattern + " = obj";
+    if (stmt[0] == "{")
+        stmt = "(" + stmt + ")";
+    stmt += ";"
+
+    // stmt is a legal statement...
+    Function(stmt);
+
+    // ...but not if you replace _ with one of these two names.
+    for (var name of ["eval", "arguments"]) {
+        var s = stmt.replace("_", name);
+        Function(s);
+        assertThrowsInstanceOf(() => Function("'use strict'; " + s), SyntaxError);
+    }
+}