Handle errors in async handlers

[hillac]

Any chance you could support handling errors in async handlers? I use express-async-errors with express to avoid the ugly try catch next block in every handler. It would obviously have to be in an option since it's not normal express behavior.

[dwbboy]

router.js 第487行 const out = callback(req, res, next); if(out instanceof Promise) { out.catch(err => { throw err; }); } 改为 callback.constructor.name == "AsyncFunction" ? await callback(req, res, next) : callback(req, res, next);

[dimdenGD]

There's now an option to support async errors: app.set('catch async errors', true) in 1.3.0