Resetting Lua module crashes darktable

[deekayhd]

When clicking on the reset button of a Lua script module darktable crashes.
To reproduce, enable the script HDRMerge and click on the reset button.

The log (option -d lua) is attached

dt_crash_reset_lua.txt

The issue occurs on my system with any Lua script that has reset enabled. I just took HDRMerge as an example. In version 5.4.1, it works fine.

darktable version 5.6.0, self-built from the provided tarball
Linux Mint 21.1 Cinnamon

[Rmano]

I can confirm (I triggered it with DB maintenance)

[wpferguson]

This is a darktable Lua API issue most likely caused by changes to libs/lib.c in the darktable source tree.