Package pathdiff.pl.
entering Algorithm::Diff::traverse_sequences
 entering Algorithm::Diff::_longestCommonSubsequence
  entering CODE(0x80fdd48)
  entering CODE(0x80fdd48)
  entering CODE(0x80fdd48)
  entering Algorithm::Diff::_withPositionsOfInInterval
   entering CODE(0x80fdcb8)
  entering CODE(0x80fdcb8)
 entering main::match
same:   a       a
 entering main::discA
omitA:  b
 entering main::discB
omitB:          c