src/third_party/mozjs-45/js/src/jit-test/tests/debug/bug1147939.js

// |jit-test| error: TypeError
var g = newGlobal();
g.debuggeeGlobal = this;
g.eval("(" + function () {
        dbg = new Debugger(debuggeeGlobal);
        dbg.onExceptionUnwind = Map;
} + ")();");
throw new Error("oops");