diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/debug/breakpoint-noncng.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/debug/breakpoint-noncng.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,21 @@
+// Breakpoints work in non-compile-and-go code. Bug 738479.
+
+var g = newGlobal();
+g.s = '';
+var dbg = new Debugger;
+var gw = dbg.addDebuggee(g);
+g.evaluate(
+    "function f() {\n" +  // fscript.startLine
+    "    s += 'a';\n" +   // fscript.startLine + 1
+    "    s += 'b';\n" +   // fscript.startLine + 2
+    "}\n",
+    {compileAndGo: false});
+
+var fscript = gw.makeDebuggeeValue(g.f).script;
+var handler = {hit: function (frame) { g.s += '1'; }};
+for (var pc of fscript.getLineOffsets(fscript.startLine + 2))
+    fscript.setBreakpoint(pc, handler);
+
+g.f();
+
+assertEq(g.s, "a1b");