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console: avoid adding infinite error listeners

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If the console destination is a unix pipe (net.Socket), write() is
async. If the destination is broken, we are adding an 'error' event
listener to avoid a process crash. This PR makes sure that we are adding
that listener only once.

Fixes: https://github.com/nodejs/node/issues/16767

PR-URL: https://github.com/nodejs/node/pull/16770
Fixes: https://github.com/nodejs/node/issues/16767
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Anatoli Papirovski <apapirovski@mac.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Sam Roberts <vieuxtech@gmail.com>
This commit is contained in:
Matteo Collina 2017-11-05 12:26:27 +00:00
parent 5dca787993
commit d82bedcb7b
2 changed files with 28 additions and 1 deletions
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5
lib/console.js
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@ -83,7 +83,10 @@ function createWriteErrorHandler(stream) {
// an `error` event. Adding a `once` listener will keep that error
// from becoming an uncaught exception, but since the handler is
// removed after the event, non-console.* writes won’t be affected.
stream.once('error', noop);
// we are only adding noop if there is no one else listening for 'error'
if (stream.listenerCount('error') === 0) {
stream.on('error', noop);
}
}
};
}