bug#390: 23.0.60; killed buffer in list from function buffer-list?

bug#390: 23.0.60; killed buffer in list from function buffer-list?

[Lennart Borgman (gmail)]

I sometimes get a killed buffer in the list returned from (buffer-list ...):

Result: (#<buffer *Messages*> #<buffer buff-menu.el> #<buffer ido.el> 
#<buffer buffer.c> #<buffer  *Minibuf-1*> #<killed buffer> #<buffer 
*grep*> #<buffer nt> #<buffer lib-src> #<buffer *GNU Emacs*> #<buffer 
*scratch*> #<buffer  *Minibuf-0*> #<buffer  *code-conversion-work*> 
#<buffer  *Echo Area 0*> #<buffer  *Echo Area 1*> #<buffer 
*ex-working-space*> #<buffer  *ex-print*> #<buffer  *server*> #<buffer 
*Buffer List*> #<buffer *Completions*> #<buffer *Ediff Registry*> 
#<buffer *Help*> #<buffer  *DOC*> #<buffer  *viper-ask-level*>)

This happen in list-buffers-noselect.

       (dolist (buffer (or buffer-list
			  (buffer-list
			   (when Buffer-menu-use-frame-buffer-list
			     (selected-frame)))))

where Buffer-menu-use-frame-buffer-list is t.

Testing it further I found that buffer-live-p with the buffer #<killed 
buffer> as an argument returns nil.

Unfortunately this is in my patched version of Emacs. I have no patches 
in src/buffer.c (which of course does not mean that my patches could not 
be involved).

The doc string for buffer-list says "Return a list of all live buffers".

In GNU Emacs 23.0.60.1 (i386-mingw-nt5.1.2600)
  of 2008-06-10 on LENNART-69DE564

bug#390: 23.0.60; killed buffer in list from function buffer-list?

[Stefan Monnier]

> I sometimes get a killed buffer in the list returned from (buffer-list ...):

That'd be a bug.  [ Of course, it may also happen that the buffer dies
between the call to buffer-list and the printing of the result, if you
do something like a sit-for or read between the two. ]

But without some kind of recipe to reproduce it, it's going to be
difficult to track it down.


        Stefan

bug#390: 23.0.60; killed buffer in list from function buffer-list?

[Lennart Borgman (gmail)]

Stefan Monnier wrote:
>> I sometimes get a killed buffer in the list returned from (buffer-list ...):
> 
> That'd be a bug.  [ Of course, it may also happen that the buffer dies
> between the call to buffer-list and the printing of the result, if you
> do something like a sit-for or read between the two. ]
> 
> But without some kind of recipe to reproduce it, it's going to be
> difficult to track it down.


I have no recipe - yet.

All I can say is that it happens and that it is about the list returned 
for one frame. If I open a new frame buffer-list works ok there.