You can get extra information for crashes in YYC builds on Windows by running them through Visual Studio and using the included Debugger.
Here's how:
1. Run your game with YYC and close it when it's done compiling (or fails to do so).
2. In your Output log, do a CTRL+F search for msbuild (lowercase result).
3. Once you find it, look for the cd command before it on the same line (it will not be at the start of the line):
... cd "C:\Users\<USERNAME>\AppData\Roaming\GameMakerStudio2\Cache\GMS2CACHE\Space_Rock_A42DD28A_A5722FE3\Space
Rocks\Default\Scripts\llvm-win\Win32solution" && set &&
msbuild
4. Copy the path after the cd command (above in bold) and open it in your Explorer/Finder.
5. This folder will contain an .sln file for your project. Open it in Visual Studio (if everything is set up correctly, you should be able to double-click on it).
Note: You may be asked to upgrade the project, for all fields please select "No Upgrade" before continuing.
6. You can now press F5 to run the game in Visual Studio. You can break in the debugger at any time (during the game or after a fatal error) to use the debugging tools included in VS.
7. Please refer to Microsoft's documentation on debugging in Visual Studio.