The PCSX-Redux project is a collection of tools, research, hardware design, and libraries aiming at development and reverse engineering on the PlayStation 1. The core product itself, PCSX-Redux, is yet another fork of the Playstation emulator, PCSX.
So, I just tried locally, and I got properly a Lua error saying there's no a0 field in the regs structure... I'm not sure how this is different between what you're doing and me locally.
While writing a lua script, I was incorrectly accessing the registers like so
This was causing pcsx-redux to crash to desktop with no warning/error/logging
Fixing the script to use the correct fields
fixed the issue, but the problem remains that the applicaton crashed from illegally accessing a struct field that didn't exist.
I'd expect that the application would handle this without crashing.
pcsx-redux-nightly-14035.20230321.9-x64