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  1. or download this
    # Save the previous filehandles for STDOUT and STDERR so we
# can restore them when we're done.
...
*STDERR_LOG = $this->{'stderr_log'};
open(STDOUT, ">&STDOUT_LOG");
open(STDERR, ">&STDERR_LOG");
  2. or download this
    if(defined($this->{'_stdout'}))
{
...
    print STDERR "STDERR restored\n";
    undef($this->{'_stderr'});
}