I hadn't even noticed it produced a warning. Which was at the very start of the TAP output, while the end of the TAP output indicated that all tests passed.

Test::NoWarnings does the trick, than you :o)
I tried to turn warnings to fatal with 

use warnings qw(FATAL all);

[download]
as indicated here using FATAL warnings, but it didn't work. It might/could be because of Windows, who doesn't like signals? I'm guessing that FATAL is maybe catching the WARN signal and making it die. But in Windows i found i couldn't catch any signals. It doesn't really matter for me right now : Test::NoWarnings works. Cheers!

PS : the problem was wider than i thought : 1>undef also returns true. Which means that any cmp_ok($got, '<', $expected) statement runs into the same risk / problem.
I'll add this to the first post.

In reply to Re^2: 0==undef, that's annoying. Is it? by mascip
in thread 0==undef, that's annoying. Is it? by mascip

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