bug#7645: 23.2; ido commands failed to execute if there is some killed buffer

[Leo]

On 2011-01-23 04:03 +0800, Chong Yidong wrote:
> Abaw <abawwu@gmail.com> writes:
>
>> [buffer-list] rarely(less than 1 time per month) returns killed
>> buffers, but it does.  Maybe some of my used packages referenced the
>> killed buffers.
>
> If so, that would be a bug.  `buffer-list' returns the contents of a
> list of live buffers maintained internally by Emacs.  When a buffer is
> killed, it should be simultaneously removed from this internal list.

I have seen this bug too due to (buffer-list t) returning killed
buffers. Unfortunately this isn't easy to reproduce.

Leo