Detect `InvocationTargetException` when initializing global variables outside setup

Created by: mglst

Current Behavior

Whilst coding I ran into RuntimeException: java.lang.reflect.InvocationTargetException. It only took a google search to find another user on the Processing Foundation Forum with the same issue, and a well explained fix: https://discourse.processing.org/t/just-starting-to-code-and-code-returns-java-lang-reflect-invocationtargetexception-error/14615/2.
There are many weird exception catching things that the Processing IDE already does to mitigate the most common of these Processing-specific oddities. The post that I link to has 2.1k, so I can safely say I'm neither the first nor last person to run into this. I find that the way Java errors are thrown is quite confusing. For instance, it complains about code at a specified line, but this refers to the 'java' file rather than the 'pde' file that I'm working on - this is not obvious and can be a source for more confusion still if I go looking for a bug at the wrong place in my code ("what even are .java files? and what do you mean I have to 'export' as application to get a glimpse at it?")

Steps to Reproduce

1. see code from https://discourse.processing.org/t/just-starting-to-code-and-code-returns-java-lang-reflect-invocationtargetexception-error/14615

Your Environment

• Processing version: 4.0a5
• Operating System and OS version: macOS 12.0B5

Solutions

I would like the IDE to detect when making such errors and warn me that I'm likely doing something wrong by defining initialising global variables outside of setup - especially since this seems like something which is fine for ints, booleans, bytes, ... (as I understand, all primitives - although confusingly also Strings)
The fact that this is a RunTime error makes me believe that this might be a tricky suggestion to implement, but I'd hope that it would be a useful enough feature to be worth the cost

Commencez par la reproduction liée du Processing Forum et par le comportement existant de l'IDE en matière de gestion des exceptions. Déterminez comment l'initialisation de variables globales en dehors de setup produit InvocationTargetException, puis définissez comment l'IDE doit le détecter et afficher un avertissement qui renvoie vers le code PDE de l'utilisateur. Le travail est terminé lorsque le cas signalé reçoit un diagnostic clair et spécifique à Processing.