Hello, Alex, your suggestion doesn't seem to work. Emil, sorry, I don't really know what to do with these hashes - if you give me the git command to run in the repo, I could try that... I can get current HEAD (58251) compiled, running, and the regression is still there. Once I start bisecting, though, the "scanner" error as in comment 5 happens. Also, I've managed to get some screenshots of the corruption, see attached.