diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/function-tosource-statement.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/function-tosource-statement.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,13 @@
+function f1(a, b) {
+    return a + b;
+}
+assertEq(f1.toString(), "function f1(a, b) {\n    return a + b;\n}");
+assertEq(f1.toSource(), f1.toString());
+function f2(a, /* ))))pernicious comment */ b,
+            c, // another comment((
+            d) {}
+assertEq(f2.toString(), "function f2(a, /* ))))pernicious comment */ b,\n            c, // another comment((\n            d) {}");
+assertEq(decompileBody(f2), "");
+function f3() { }
+assertEq(f3.toString(), "function f3() { }");
+assertEq(decompileBody(f3), " ");