René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Fix or Mark apis in the documentation that cannot be try/catch/promised","articleBody":"Certain library objects that extend EventEmitter emits error on callback that are not caught by a try/catch or Promise. If it is not possible to address this in code somehow, those objects and methods should be marked in the documentation as requiring an error listener.\n\nIMPACT:\nNode.js throws uncaught exception in edge-case situations\n\nExample 1: failing dns request\n\n``` javascript\nnode --eval \"new Promise(r =\u003e new (require('http').Server)().listen(0, '#$%'))\"\nevents.js:160\n      throw er; // Unhandled 'error' event\n      ^\n\nError: getaddrinfo ENOTFOUND #$%\n    at errnoException (dns.js:28:10)\n    at GetAddrInfoReqWrap.onlookup [as oncomplete] (dns.js:79:26)\n```\n\nExample 2: failed spawn\n\n``` javascript\nnode --eval \"new Promise(r =\u003e require('child_process').spawn('error factory'))\"\nevents.js:160\n      throw er; // Unhandled 'error' event\n      ^\n\nError: spawn error factory ENOENT\n    at exports._errnoException (util.js:1026:11)\n    at Process.ChildProcess._handle.onexit (internal/child_process.js:182:32)\n    at onErrorNT (internal/child_process.js:348:16)\n    at _combinedTickCallback (internal/process/next_tick.js:74:11)\n    at process._tickCallback (internal/process/next_tick.js:98:9)\n```\n\n\u003e uname --all \u0026\u0026 node --version\n\u003e Linux c89 4.4.0-34-generic #53-Ubuntu SMP Wed Jul 27 16:06:39 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux\n\u003e v6.4.0\n","author":{"url":"https://github.com/haraldrudell","@type":"Person","name":"haraldrudell"},"datePublished":"2016-08-21T18:27:35.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":12},"url":"https://github.com/8211/node/issues/8211"}