1 files changed, 16 insertions, 0 deletions
diff --git a/js/src/tests/non262/destructuring/constant-folding.js b/js/src/tests/non262/destructuring/constant-folding.js
new file mode 100644
index 0000000000..b5aa893215
--- /dev/null
+++ b/js/src/tests/non262/destructuring/constant-folding.js
@@ -0,0 +1,16 @@
+function assertSyntaxError(code) {
+    assertThrowsInstanceOf(function () { Function(code); }, SyntaxError, "Function:" + code);
+    assertThrowsInstanceOf(function () { eval(code); }, SyntaxError, "eval:" + code);
+    var ieval = eval;
+    assertThrowsInstanceOf(function () { ieval(code); }, SyntaxError, "indirect eval:" + code);
+}
+
+// |true && a| is constant-folded to |a|, ensure the destructuring assignment
+// validation takes place before constant-folding.
+for (let prefix of ["null,", "var", "let", "const"]) {
+    assertSyntaxError(`${prefix} [true && a] = [];`);
+    assertSyntaxError(`${prefix} {p: true && a} = {};`);
+}
+
+if (typeof reportCompare === "function")
+    reportCompare(true, true);