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#!/usr/bin/perl ... open AA, ">/tmp/myfd2" or die $!; # gets fd 2 open STDERR, ">/tmp/myfd3" or die $!; # gets fd 3 warn "Hello";
$ strace -eopen,write ./849816.pl ... ... open("/tmp/myfd3", O_WRONLY|O_CREAT|O_TRUNC, 0666) = 3 write(3, "Hello at ./849816.pl line 6.\n", 29) = 29 ^
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