#!perl -nlw
#  tail -c +0 -f $(ls main-on-201* | tail -1) | perl ../random/cabal-description.pl| egrep --line-buffered ' (ERROR|Completed|ROOT FAILURE|xargs|plzip| synopsis:| description:|Died at) ' | perl ../random/avoid-duplicate-lines.pl
use FileHandle;
BEGIN{
    STDOUT->autoflush(1);
}
($s=$_)=~s/^[0-9.]+:  //;
unless($seen{$s}){
    print;
    $seen{$s}=1;
    # unbounded memory consumption
}