bug#11852: Hook `find-file-not-found-functions' is ignored

bug#11852: Hook `find-file-not-found-functions' is ignored

[Dirk Ullrich]

This bug report will be sent to the Bug-GNU-Emacs mailing list
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Please write in English if possible, as the Emacs maintainers
usually do not have translators for other languages.

Please describe exactly what actions triggered the bug, and
the precise symptoms of the bug.  If you can, give a recipe
starting from `emacs -Q':

1. Ensure that `find-file-not-found-functions' only contains a simple test
   function - for instance by:
   1.1. Creating a simple file -- say `file-not-found-test.el' -- with the
        following content:

(setq find-file-not-found-functions '())
(add-hook 'find-file-not-found-functions
          (function
           (lambda () (message "Test for `find-file-not-found-functions'"))))

   1.2 Load th file from 1.1 by:
       emacs -Q -l file-not-found-test.el

2. Open a buffer for a non-existing file by `find-file'.
   Result: function in `find-file-not-found-functions' is not called.

If Emacs crashed, and you have the Emacs process in the gdb debugger,
please include the output from the following gdb commands:
    `bt full' and `xbacktrace'.
For information about debugging Emacs, please read the file
/usr/local/packages/emacs-devel/share/emacs/24.1.50/etc/DEBUG.


In GNU Emacs 24.1.50.1 (x86_64-unknown-linux-gnu, GTK+ Version 3.4.2)
 of 2012-07-03 on red
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 '--localstatedir=/var//local/packages/emacs-devel'
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bug#11852: Hook `find-file-not-found-functions' is ignored

[Glenn Morris]

Dirk Ullrich wrote:

> 2. Open a buffer for a non-existing file by `find-file'.
>    Result: function in `find-file-not-found-functions' is not called.

Seems that since "higher-resolution time stamps" patch;

    (insert-file-contents "does-not-exist" t)

does not return an error.

b fileio.c:4354

p NONEXISTENT_MODTIME_NSECS
$1 = -1

p current_buffer->modtime
$2 = {
  tv_sec = -1, 
  tv_nsec = 8
}

p EMACS_NSECS (current_buffer->modtime)
$3 = 8

> In GNU Emacs 24.1.50.1 (x86_64-unknown-linux-gnu, GTK+ Version 3.4.2)
>  of 2012-07-03 on red

bug#11852: Hook `find-file-not-found-functions' is ignored

[Andreas Schwab]

It was using an uninitialized value.

Andreas.

-- 
Andreas Schwab, schwab@linux-m68k.org
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