On my Debian Etch I get the incorrect result a1 from perl shipped with Debian. 

$ perl -v
This is perl, v5.8.8 built for i486-linux-gnu-thread-multi

[download]

But it seems to be fixed in 5.9.5 (correctly produces ab):

This is perl, v5.9.5 DEVEL31566 built for i686-linux

Perl 6 in German

In reply to Re: Strange warn behavior in loop by moritz
in thread Strange warn behavior in loop by deibyz

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