While trying to generate ctags for the Mercurial project, I noticed that ctags hangs on a particular .vim script.
- Run ctags on `contrib/vim/hgcommand.vim` in revision d93c23b31797 or later
- Ctags will hang
- The broken version of hgcommand.vim: http://selenic.com/repo/hg/file/d93c23b31797/contrib/vim/hgcommand.vim
- The previous, working, version of hgcommand.vim: http://selenic.com/repo/hg/file/f80057407c07/contrib/vim/hgcommand.vim