Stefan Monnier <monnier@iro.umontreal.ca> writes:

>>   When I do C-x C-f /a/b/c, with shell being /bin/sh (zsh emuled),
>>   I still have a weird behavior:
>
>> <TAB>
>> read-file-name-internal: Opening directory: no such file or directory, /a*/b*/
>> <TAB>
>> read-file-name-internal: Opening directory: no such file or directory, /a**/b**/
>> <TAB>
>> read-file-name-internal: Opening directory: no such file or directory, /a***/b***/
>> <TAB>
>> read-file-name-internal: Opening directory: no such file or directory, /a****/b****/
>
>>   AFAIU, this patch fixes the /c* bug (i.e. the last part of the filename
>>   being completed) but not the whole problem.
>
> Hmm... I remember working on such a bug report a few months ago.
> Can't remember whether I had fixed it at the time and if so how.  But in any
> case, I can't reproduce the problem right now.

  My bad, I recompiled a freshly checkouted Emacs and it works almost
  right.

  When I do C-x C-f /a/b/c TAB, no star are added, but an _error_ is
  triggered instead of a [no match].

  IMHO, it's due  to file_name_completion, and I'd be  very tempted to
  make the following: