diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/function-tosource-exprbody-bug777834.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/function-tosource-exprbody-bug777834.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,5 @@
+load(libdir + "asserts.js");
+
+assertThrowsInstanceOf(function () {
+    eval("function f()((l()))++2s");
+}, SyntaxError);