net: fix net.connect() resource leak

The 'connect' event listener was attached with .on(), which blocked it from
getting garbage collected. Use .once() instead.

Fixes #4308.

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/net.js b/lib/net.js
index efed0cacde..f8b77b2df6 100644
--- a/lib/net.js
+++ b/lib/net.js
@@ -665,7 +665,7 @@ Socket.prototype.connect = function(options, cb) {
   }
 
   if (typeof cb === 'function') {
-    self.on('connect', cb);
+    self.once('connect', cb);
   }
 
   timers.active(this);