When using the 'logger' config to specific a logging facility (such as process.stdOut) with anything after NodeJs 4.2.4 you get crashes and/or stalled processes when using nodeJs debug mode.
Using Node 5.x the process stalls. Using Node 4.2.5+ you will see exit code 139.
This is related to nodejs/node#4440.
Tested on AWS SDK 2.2.33.
Reverting to 4.2.4 resolved the issue for now. Possible workaround: avoid util.inspect().