Bonjour Michaël,
> Using grep() with "$re" results in all the fields matching.  Using on
> the contrary "/$re/" in grep(), like list_files(), would only match
> the first one, which is correct.
Ok, good catch. Perl is kind of a strange language.
> With this issue fixed, I have bumped into what looks like a different 
> bug in the tests.  001_pgbench_log_2 uses pgbench with 2 clients, but> 
> expects only patterns in the logs where the first column value uses only 
> 0.  With two clients, those first values can be either 0 or 1 due to the 
> client ID set.
Indeed. The tests passes because the number of expected lines is quite
> It seems to me that we had better fix this issue and back-patch where
> this has been introduced so as we have exact match checks with the log
> formarts, no?  Please see the attached.
Ok, however the regex should be "^[01] ...".
Attached v11 with your fixes + the above regex fix.
-- 
Fabien.