I can't really see, how "die" in your code could produce any output. It is called by ALRM signal handler inside of eval, so the output of "die" is saved in $@ and not printed anywhere. If you get some output, then it comes from somewhere else. Check for example this code
my $ch;
eval{
$SIG{ALRM} = sub{
die "Waiting finished\n";
};
alarm(10);
$ch = <STDIN>;
alarm(0);
};
if($@)
{
print "Timeout happened\n";
}
else
{
print "Got $ch";
}
You'll never see "Waiting finished" because it is stored in $@ variable and the code does not print it.
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