mje,

Thank you for the feedback.

This would not work for some code I use as warnings are often issued with warn()

If you are referring to warn, then there is no problem. use warnings FATAL => 'all'; will not cause a warn to die, as shown by this example:

use warnings FATAL => 'all';
use strict;

warn "foo\n";
warn "bar\n";

__END__

foo
bar
[download]

I have never used Log::Log4perl (or any similar logging modules), but I would be surprised if it promoted its warnings to fatals. When I get a chance, I will try to figure out how to use the Log module to confirm your assertion. Feel free to post a small example which proves this. Thanks for pointing this out.

UPDATE: Here is my 1st attempt at using Log::Log4perl. In this mode, the warning is not promoted to a fatal. I have more to learn about the module.

use strict;
use warnings FATAL => 'all';

use Log::Log4perl qw(:easy);
Log::Log4perl->easy_init($DEBUG);

WARN("foo");
DEBUG "A low-level message";
ERROR "Won't make it until level gets increased to ERROR";
WARN('bar');

__END__

2011/10/12 21:05:08 foo
2011/10/12 21:05:08 A low-level message
2011/10/12 21:05:08 Won't make it until level gets increased to ERROR
2011/10/12 21:05:08 bar
[download]

I also tried the Core Log::Message module, and I did not observe warnings turning into fatals there either.