What hippo said. It's quite easy to exemplify this effect: 

c:\@Work\Perl>perl -wMstrict -le
"my $overwrite = qq{AAAAA\rbbbb\rCCC\rdd\rE};
 print $overwrite;
"
EdCbA

[download]

Update: I would say the problem is likely not so much with leading or trailing carriage returns as with embedded  \r characters as in the example.

Give a man a fish:  <%-{-{-{-<

In reply to Re: Strings overwrite themselves in print command by AnomalousMonk
in thread Strings overwrite themselves in print command by tdsny71

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