The build_subtree subroutine has a sanity test line as follows

  if ($line !~ /^\(.*\)\s*$/) {
    print "here: $line\n";
    return undef;
  }

[download]

And input $line has "1 , 4885".

In reply to Re^4: Can't use an undefined value as a HASH reference by Anonymous Monk
in thread Can't use an undefined value as a HASH reference by Anonymous Monk

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