Ah, it's crashing on Release on Windows too, Debug is fine. The problem is some weird memory corruption that occurs over time and I think has something to do with storing Strings in reg variables. If I change the reg to var in your snippet, it doesn't crash, also if I comment out the lines that store strings into the reg slots...
Which configuration are you using? Release build on Windows?
Alright, please try it now, I've just commited a fix for it.
It should also prevent dangling repaint calls, control callbacks whatever from being executed. Actually there is already a protection in place, but for some reason it failed, so now we have double protection against dangling callbacks 
Yup, that's a good example. The problem is if you recompile a script while a timer is running, then it will try to execute a timer callback for a nonexisting engine. I'll look into it...
Nope, it works here. Do you have the MIDI files in your project repository folder?
Yeah I haven't ever codesigned a AAX plugin and nobody complained... I can imagine that the wraptool also codesigns it.
Another helpful tool might be raw::Builder::getModuleTreeString()
https://docs.hise.audio/cpp_api/raw/classhise_1_1raw_1_1_builder.html#class-methods
pretty sure you can export the module graph, convert it to xml and throw that onto any visualiser.
@Lunacy-Audio Can you make a snippet that crashes reliably, that will save me some time...