diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/function-tosource-bug779694.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/function-tosource-bug779694.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,8 @@
+// This test creates poorly compressible input, which tests certain paths in
+// source code compression.
+var x = "";
+for (var i=0; i<400; ++i) {
+    x += String.fromCharCode(i * 289);
+}
+var s = "'" + x + "'";
+assertEq(Function("evt", s).toString(), "function anonymous(evt) {\n" + s + "\n}");