This extension is not distributed with Mercurial.
Author: Michael Diamond
Project home: http://www.digitalgemstones.com/projects/b/
A lightweight bug tracker designed to integrate with Mercurial commits, and make bug tracking as simple and distributed as Mercurial makes version control.
Configure your .hgrc to enable the extension by adding following lines:
[extensions] b=/path/to/b.py [bugs] #optional user=Name to file bugs with, or hg.user to use your commit name #optional dir=Where to save bugs - default is .bugs