no_log doesn't prevent logging

[Ivan Voras]

Hi,

I have a command task executed with a certain security-sensitive environment variables, and to my surprise, no_log in a task doesn't actually prevent logging of anything to the remote node's syslog. According to some users (http://grokbase.com/t/gg/ansible-project/151egjaphg/no-log-true-being-ignored), even command lines are logged, though I don't see them in my own logs.

So, what would be needed to prevent the environment from being logged? What code is missing / broken?