Dapper: hitting q: in (g)vim causes a long cpu hang when syntax highlighting is enabled

[Simon Ruggier]

1. open vim or gvim
2. type ":syntax on" without the quotes, if needed
3. hit q: (start editing an Ex command-line)

Result: on my Athlon 64 3400+, vim hangs for 9 seconds. On a slower computer, this could easily end up being twice as long.

Expected: instantaneous response from the command. try hitting q/

I've never seen this happen before, not even on Breezy. It started happening when I upgraded to Dapper.

[Dennis Kaarsemaker (dennis)]

I don't see this on dapper (i386) at all... Random guess: could you try
without vimrc?

[Simon Ruggier (simon80)]

I did that, that's how I figured out that it was related to syntax highlighting. Next time I use Ubuntu I'll try to profile it or something (if possible).

[Matt Zimmerman (mdz)]

I don't see any such delay here

[Francois-Denis Gonthier (fdgonthier)]

I don't see any delay on my 3200+. If this is related to the content of the user .vimrc, then I think we will need more detail to investigate this bug.

[Simon Ruggier (simon80)]

I tried to make it clear in my bug description, but here are the two important cases:

type :syntax on - The hangup bug occurs when q: is typed

type :syntax off - the hangup bug does not occur when q: is typed

This bug has nothing to do with my vimrc, save for the fact that I run 'syntax on' in it.

[Simon Ruggier (simon80)]

I happen to be viewing this page, so I might as well point out that I no longer see this bug.

[Constantine Evans (cevans)]

Since the reporter was the only one to see this, and is no longer seeing it, and I am also unable to see it in Edgy, I am closing it as Fix Released.