Comment 7 for bug 1254447

How did you determine that it was the undo file causing the issue? I tried to recreate this with apt-clone (which is used by the release upgrader to save information about the system state) after having made a vim undo file in my /etc/apt/sources.list.d/ folder. Running apt-clone clone I was able to create a clone file and did not receive a crash with the undo file. Do any of your other sources files have unicode in them? Thanks in advance!