1 files changed, 12 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/debug/bug-1260728.js b/js/src/jit-test/tests/debug/bug-1260728.js
new file mode 100644
index 000000000..fbccb448e
--- /dev/null
+++ b/js/src/jit-test/tests/debug/bug-1260728.js
@@ -0,0 +1,12 @@
+// |jit-test| error:Error
+
+var g = newGlobal();
+var dbg = new Debugger(g);
+dbg.onNewScript = function(script) {
+  fscript = script.getChildScripts()[0];
+}
+g.eval("function f(x) { arguments[0] = 3; return x }");
+fscript.setBreakpoint(0, {hit:function(frame) {
+  assertEq(frame.eval("assertEq(arguments, undefined)").return, 1);
+}});
+assertEq(g.f(1), 42);