1 files changed, 9 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/debug/Environment-setVariable-06.js b/js/src/jit-test/tests/debug/Environment-setVariable-06.js
new file mode 100644
index 0000000000..9b235dfe7a
--- /dev/null
+++ b/js/src/jit-test/tests/debug/Environment-setVariable-06.js
@@ -0,0 +1,9 @@
+// setVariable on an argument works as expected with non-strict 'arguments'.
+
+var g = newGlobal({newCompartment: true});
+g.eval("function f(a) { debugger; return arguments[0]; }");
+var dbg = new Debugger(g);
+dbg.onDebuggerStatement = function (frame) {
+    frame.environment.setVariable("a", 2);
+};
+assertEq(g.f(1), 2);