RFC: Fix for issue 1827

[Sune Foldager]

On 15-02-2010 23:07, Sune Foldager wrote:
> +            wl, wlock = wlock, None
> +            wl.release()

Actually, a problem is if you press ctrl+c between those lines.
Unfortunately, wlock's can just be released more than once without
potential bad effects (if they are recursively held).

A solution could be moving the hook-invoke code down in the finally or
underneath it (with a condition, if necessary, to only invoke it when
appropriate).

Another possibility is to wrap the try-finally code in a function, so
the hook can be invoked just after it returns. Even more annoying :-p.

/Sune