Notice: Undefined index: name in system_sort_modules_by_info_name()

Got this error this morning. A quick burn through drupal.org didn't turn up an explanation of what, exactly, this error message means so I did a little digging. Long story short, if you're getting this error it means you've screwed something up in your module's .info file.

How I triggered this error

// $Id$
name = Force Password Change
...

The fix

; $Id$
name = Force Password Change

Takeaway

Apparently .info files with php style comments in them make system.module angry. Live and learn.