Temp DLL files prefixed with ~ when editor is open

[levidavidmurray]

Window 11
Godot v4.2.rc1.official
godot-jolt 0.10.0

I didn't realize that I had initially committed this ~.dll file, and was confused as to why git was reporting a deleted file after closing the editor. I can add it to my .gitignore easily enough, but I'm just wondering if this is expected (or known about) as I haven't been able to find any mention of it.

I first noticed it with this ~.dll~[...].TMP file that was somehow created. I haven't been able to reproduce the .TMP file, but it's worth noting that I was unable to delete it while the editor was open, and it persisted even after closing the editor (regular ~.dll was deleted).

This is after deleting the ~.dll file from remote:

Editor Closed

Editor Open

I suppose it's likely this is something specific to GDExtensions in Godot 4.2.rc1, but I figured I'd start here to see if you're at all aware of this.

✌️

[mihe]

I suppose it's likely this is something specific to GDExtensions in Godot 4.2.rc1

Indeed. This is to facilitate hot-reloading of extension DLLs on Windows, as seen in godotengine/godot#80188 and godotengine/godot#80284, where Godot needs to first copy any extension DLLs to a temporary file and then load that file instead, due to Windows locking any files that are currently open/loaded, which prevents them from being overwritten.

I'm not entirely sure where the *.TMP file comes from, but I would wager that it likely comes from Godot's "Safe Save on Backup then Rename" editor setting, which you'll find under "Editor Settings / FileSystem / On Save", which causes Godot to always write (or in this copy) to a temporary file first before moving that to its final destination.

and it persisted even after closing the editor

You should ideally report this to godotengine/godot, as failure to remove these temporary files is a bug.