[kompare] [Bug 447778] New: Kompare saves an empty patch file

[Christopher Yeleighton]

https://bugs.kde.org/show_bug.cgi?id=447778

            Bug ID: 447778
           Summary: Kompare saves an empty patch file
           Product: kompare
           Version: 4.1.21120
          Platform: openSUSE RPMs
                OS: Linux
            Status: REPORTED
          Severity: major
          Priority: NOR
         Component: general
          Assignee: kompare-devel at kde.org
          Reporter: giecrilj at stegny.2a.pl
  Target Milestone: ---

SUMMARY
Kompare saves an empty patch file

STEPS TO REPRODUCE
1. { echo 1 > 1; } 
2. { echo '1
2' > 2; }
3. Tell Kompare to compare source file 1 to destination file 2.
4. Tell Kompare to save { diff -U 3 -- 1 2; } as patch file 2.diff.
5. Tell Kompare to open patch file 2.diff.

OBSERVED RESULT
The file 2.diff is invalid.

EXPECTED RESULT
The file 2.diff shall be valid.

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: openSUSE Tumbleweed 20211228
(available in About System)
KDE Plasma Version: 5.23.4
KDE Frameworks Version: 5.89.0
Qt Version: 5.15.2

ADDITIONAL INFORMATION

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