src/third_party/mozjs-45/js/src/jit-test/tests/debug/Debugger-onNewPromise-07.js

// Errors in onNewPromise handlers are reported correctly, and don't mess up the
// promise creation.

var g = newGlobal();
var dbg = new Debugger(g);

let e;
dbg.uncaughtExceptionHook = ee => { e = ee; };
dbg.onNewPromise = () => { throw new Error("woops!"); };

assertEq(typeof g.makeFakePromise(), "object");
assertEq(!!e, true);
assertEq(!!e.message.match(/woops/), true);