diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/bug791465.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/bug791465.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,77 @@
+load(libdir + "asserts.js");
+
+var valid_strict_funs = [
+  // directive ends on next line
+  function () {
+    "use strict"
+    ;
+  },
+  function () {
+    "use strict"
+  },
+  // directive ends on same line
+  function () { "use strict"; },
+  function () { "use strict" },
+];
+
+for (var f of valid_strict_funs) {
+  assertThrowsInstanceOf(function() { f.caller }, TypeError);
+}
+
+
+var binary_ops = [
+  "||", "&&",
+  "|", "^", "&",
+  "==", "!=", "===", "!==",
+  "<", "<=", ">", ">=", "in", "instanceof",
+  "<<", ">>", ">>>",
+  "+", "-",
+  "*", "/", "%",
+];
+
+var invalid_strict_funs = [
+  function () {
+    "use strict"
+    , "not";
+  },
+  function () {
+    "use strict"
+    ? 1 : 0;
+  },
+  function () {
+    "use strict"
+    .length;
+  },
+  function () {
+    "use strict"
+    [0];
+  },
+  function () {
+    "use strict"
+    ();
+  },
+  ...([]),
+  ...[Function("'use strict'\n " + op + " 'not'") for (op of binary_ops)],
+];
+
+for (var f of invalid_strict_funs) {
+  f.caller;
+}
+
+
+var assignment_ops = [
+   "=", "+=", "-=",
+  "|=", "^=", "&=",
+  "<<=", ">>=", ">>>=",
+  "*=", "/=", "%=",
+];
+
+var invalid_strict_funs_referror = [
+  ...[("'use strict'\n " + op + " 'not'") for (op of assignment_ops)],
+];
+
+// assignment with string literal as LHS is an early error, therefore we
+// can only test for ReferenceError
+for (var f of invalid_strict_funs_referror) {
+  assertThrowsInstanceOf(function() { Function(f) }, ReferenceError);
+}