GNU bug report logs - #19607
issue with Emacs 24.4.1 but not with 24.3.1 : changed on disk; really edit the buffer

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From: Bertrand Brelier <bertrand.brelier <at> gmail.com>
To: Paul Eggert <eggert <at> cs.ucla.edu>
Cc: 19607 <at> debbugs.gnu.org
Subject: bug#19607: issue with Emacs 24.4.1 but not with 24.3.1 : changed on disk; really edit the buffer
Date: Fri, 23 Jan 2015 08:15:48 -0500

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Hello Paul,

Sorry, I have not used gdb for a while a forgot about asking the debugger
to continue.

I followed your request and you can see the log file attached to this email.

I modified the file 2 times : the first time, no issue I can save the file
but when I try to modify it a second time, emacs tells me :changed on disk;
really edit the buffer .....

Thanks for your help,

Cheers,

Bertrand

On Thu, Jan 22, 2015 at 5:42 PM, Paul Eggert <eggert <at> cs.ucla.edu> wrote:

> On 01/22/2015 01:26 PM, Bertrand Brelier wrote:
>
>> I tried with r- Q but same issue, emacs freezes when I start editing the
>> file (I can open it but not modify its content)
>>
> Ah, sorry, I wasn't explicit enough.  How about this.  When Emacs freezes,
> print the requested values in the debugger and then continue with the "c"
> command.  I just now did that, with the following results for me:
>
> $ gdb ./emacs
> (gdb) source .gdbinit
> (gdb) b fileio.c:5338
> (gdb) r -Q
> [In emacs, type C-x C-f abcdef RET, then type "x".]
> Breakpoint 3, Fverify_visited_file_modtime (buf=27596677) at fileio.c:5338
> 5338      if (timespec_cmp (mtime, b->modtime) == 0
> (gdb) p mtime
> $1 = {
>   tv_sec = 1421966150,
>   tv_nsec = 791881570
> }
> (gdb) p b->modtime
> $2 = {
>   tv_sec = 1421966150,
>   tv_nsec = 791881570
> }
> (gdb) c
> Continuing.
> [In emacs, type C-x C-s.]
>
> Breakpoint 3, Fverify_visited_file_modtime (buf=27596677) at fileio.c:5338
> 5338      if (timespec_cmp (mtime, b->modtime) == 0
> (gdb) p mtime
> $3 = {
>   tv_sec = 1421966150,
>   tv_nsec = 791881570
> }
> (gdb) p b->modtime
> $4 = {
>   tv_sec = 1421966150,
>   tv_nsec = 791881570
> }
> (gdb) c
> Continuing.
>
> Breakpoint 3, Fverify_visited_file_modtime (buf=27596677) at fileio.c:5338
> 5338      if (timespec_cmp (mtime, b->modtime) == 0
> (gdb) p mtime
> $5 = {
>   tv_sec = 0,
>   tv_nsec = -1
> }
> (gdb) p b->modtime
> $6 = {
>   tv_sec = 1421966150,
>   tv_nsec = 791881570
> }
> (gdb) c
> Continuing.
> [At this point, Emacs says "Wrote /home/eggert/decrypted/abcdef.]
>

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