joyent/node — pull request #6649 by vkurchatkin (2013-12-06 12:05:51+00:00)
Title: node: check if `er` is undefined

Throwing `undefined` causes segmentation fault when uncaught.

That works in 0.10.22 but was broken with c16963b977b3cede4cef476c275226a513831407.