After about 15 minutes and endless commands, Claude indeed managed to nail the issue. It is a bug in SDL3.4, reported as `SDL_ShowOpenFileDialog`'s `default_location` handling of multiple levels of missing paths causes `callback` to be invoked twice on Windows (SDL 3.4.2) · Issue #15194 · libsdl-org/SDL · GitHub. There is a PR for fixing this. Claude however managed to find a dirty but simple and effective work around. Sometime I want to throw the AI through the window, but this time I am pretty impressed and it saved me a lot of annoying work. Note that I started using ChatGPT. This failed miserably finding the actual cause as it got on the wrong track due to the misleading error message. It then suggested several work arounds for something that was not the problem, so it got nowhere.
P.s. Triggered building the daily, so the last (March 12) should be ok.