Godot 4.4 throws errors when using await on EditorPlugin

[WagnerGFX]

Tested versions

• Reproducible: 4.4-dev1 and 4.4-dev7
• Not Reproducible: 4.3-stable

System information

Godot v4.4.dev7 - Windows 10 (build 19045) - Multi-window, 1 monitor - Vulkan (Forward+) - dedicated NVIDIA GeForce GTX 1650 (NVIDIA; 32.0.15.6603) - Intel(R) Core(TM) i7-2600K CPU @ 3.40GHz (8 threads)

Issue description

When the editor starts up, calling code from an Autoload to an EditorPlugin with a function that uses while and await will result in either:

• Working fine.
• Throwing a Bad Address Index error.
• Throwing an Internal Script error with opcode 0, 1 or 99.
• Crashing to desktop.

Steps to reproduce

The MRP will throw the error when opening the project. If it doesn't, use "Project > Reload Current Project" as sometimes it may simply work.

This problem seems to require a combination of a few situations to happen:

• The EditorPlugin must be enabled. The issue vanishes when disabled, even if there are no changes in the script execution.
• The function must be called from the Autoloader to the EditorPlugin, if called from inside the EditorPlugin, it works fine.
• the EditorPlugin class must be loaded inside the function using load(). Works fine with a preloaded variable on the class scope.
• The await must be inside the while loop.

Some background on why I'm running code like this:

• To isolate editor access to only inside the EditorPlugin class.
• My plugin checks for a resource file, if it doesn't exist, creates the file and updates the FileSystem if it's in editor mode.
• After v4.2 or v4.3, the FileSystem takes a while to load and during that time any new files or requests to update are ignored.
• I can't use preload() because EditorPlugin classes are not exported to runtime.

Minimal reproduction project (MRP)

project_bad_address.zip