Any guides on debugging DMD crash?

[Matt Jones]

Does anyone have a guide on how to debug DMD crashes? I've been 
getting compiler crashes on version 2.087.1 through 2.091.0 (only 
release mode on both Windows 10 and Linux). Version 2.086.1 was 
the last one that worked:

dub run --arch=x86_64 --build=release

C:\D\dmd2\windows\bin\dmd.exe failed with exit code -1073741795.

Here is the smallest code snippet I could make crash: 
https://github.com/workhorsy/crash_dmd