[Bug 160661] New: kompare fails horribly to show the differences in files.

[Scott King]

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http://bugs.kde.org/show_bug.cgi?id=160661         
           Summary: kompare fails horribly to show the differences in files.
           Product: kompare
           Version: 3.4
          Platform: Gentoo Packages
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: general
        AssignedTo: kompare-devel kde org
        ReportedBy: scott.king tamucc edu


Version:           3.4 (using KDE 3.5.9)
Installed from:    Gentoo Packages
Compiler:          gcc version 3.4.6 (Gentoo 3.4.6-r2, ssp-3.4.6-1.0, pie-8.7.10) built from emerge kde
OS:                Linux

The algorithm the kompare is using is either buggy or there are some pointer problems somewhere.

I had to lists of students in alphabetical oder from two different semesters.  One had five lines less than the other, One had 14 different names, the other had 9.  When I did a kompare on the two lists, it showed only 3 different lines,
1 changed, 1 added, and 1 deleted.  And it said both files are of the same length. I did this running kompare from the command line  (kompare file1 file2).  If I do in the other way around, I get the same behavior, except the files are now only 1 line different and they are the shorter length.  If I select the files using the GUI I get the same thing.  I've
tried turning off all options, same behavior.  diff, of course gives me a much different picture.

I then put together two show files
------------------------- cut -------------------------
different line 1 file 2
common line
common line
different line 2 file 2
common line
common line
different line 3 file 2
------------------------- cut ---------------------------
different line 1 file 1
common line
common line
different line 2 file 1
common line
common line
different line 3 file 1
------------------------- cut ----------------------------

This is a much simpler case, only 3 changed lines and 4 unchanged lines.  Here kompare gives me 
that the first line only is changed and it shows nothing in line one of the second file.  The second file is
also a copy of the first file, regardless of what order I do the kompare.


I am running the laters version of kde available through emerge in gentoo

might be related to bug 75917 (very old bug)