Easy to reproduce: `JPEGReadWriter2Test suite run` with a VM compiled with cygwin (mingw cross platform) toolchain. This might be related to this commit or not: https://github.com/OpenSmalltalk/opensmalltalk-vm/commit/7e0018d2bda239f11f6...
The commit tells that assert VM crashes even when built with MSVC toolchain (w or w/o clang-cl.exe).
I think that a good part of the problem is that we call `_setjmp` but then `longjmp` instead of `_longjmp` in `error_exit`.
If we (re)`#define setjmp` then we must also (re)`#define longjmp _longjmp`
The commit fixed it for me