chomp removes \r\n only on MSWin. On Linux, it only removes \n: 
~$ perl -E '$x = "|\r\n";print $x;chomp $x; print $x' | xxd
0000000: 7c0d 0a7c 0d                             |..|.

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In reply to Re^4: different length of a line from linux and windows textfile? ("\r") by choroba
in thread different length of a line from linux and windows textfile? by Microcebus

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