Thanks Jeff, I meanwhile found out that the diff tool also crashes independently of its use with Git, and was able to isolate the problem a bit further using gdb. -- Sebastian Schuberth On Mon, Jan 9, 2023 at 9:07 PM Jeff Hostetler <git@xxxxxxxxxxxxxxxxx> wrote: > > > > On 1/9/23 8:35 AM, Sebastian Schuberth wrote: > > Hi, > > > > similar to this [1] question on StackOverflow, ever since a > > distribution upgrade of my Fedora Linux box (KDE spin, now on release > > 37), my configured diff / merge tool (Beyond Compare 4) crashes with > > "fatal: external diff died, stopping at ..." after displaying the diff > > for the first file, for every operation I've tried so far (including > > resolving merge conflicts). I've also posted to the Beyond Compare > > forums [2], but the people from Scooter Software seem to be clueless > > as well. > > > > Would anyone have an idea how to debug this? > > > > PS: I also tried to use an X11 instead of a Wayland session with KDE / > > Plasma, but that did not help. > > > > [1]: https://askubuntu.com/questions/1437667/git-difftool-with-meld-broken-after-update-to-22-04-fatal-external-diff-died > > [2]: https://forum.scootersoftware.com/forum/beyond-compare-4-discussion/linux-aa/88824-bc4-as-a-git-merge-tool-says-fatal-external-diff-died > > > > You might try turning on Trace2 in Git and see if there is > any extra info there on the child processes. > > $ GIT_TRACE2_PERF=1 git difftool ... > > or > > $ export GIT_TRACE2_PERF=/absolute/path/to/logfile > $ git difftool ... > > There you'll be able to see all of the "child_start" and > "child_exit" events for each process that Git starts (at > the "d1" level (and grandchildren at the "d2" level)). > > Maybe that'll reveal something. > > https://devblogs.microsoft.com/devops/a-deep-dive-into-git-performance-using-trace2/ > > > Hope this helps, > Jeff
