diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/debug/Script-getAllColumnOffsets-01.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/debug/Script-getAllColumnOffsets-01.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,19 @@
+// getColumnOffsets correctly places the various parts of a ForStatement.
+
+var global = newGlobal();
+Debugger(global).onDebuggerStatement = function (frame) {
+    var script = frame.eval("f").return.script;
+    script.getAllColumnOffsets().forEach(function (offset) {
+        script.setBreakpoint(offset.offset, {
+            hit: function (frame) {
+                assertEq(offset.lineNumber, 1);
+                global.log += offset.columnNumber + " ";
+            }
+        });
+    });
+};
+
+global.log = '';
+global.eval("function f(n) { for (var i = 0; i < n; ++i) log += '. '; log += '! '; } debugger;");
+global.f(3);
+assertEq(global.log, "25 32 44 . 39 32 44 . 39 32 44 . 39 32 57 ! 69 ");