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$|=1;
my $ret1 = `date`;
...
    my $exit2 = $?;
    print STDERR "exit2=$exit2 ret2=$ret2";
}

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exit1=0 ret1=Wed Jun 20 22:29:13 CEST 2007
Sigchld
...
exit2=-1 ret2=Wed Jun 20 22:29:13 CEST 2007
Sigchld
exit2=-1 ret2=Wed Jun 20 22:29:13 CEST 2007