[DavidVoid]

There's a great Random ASCII blog post about an obscure FPU issue like this [1].

  - The crash was in a FPU that Chrome barely uses  
  - The instruction that crashed Chrome was thousands of instructions away from the one that triggered the exception  
  - The instruction that triggered the exception was not at fault  
  - The crash only happened because of third-party code running inside of Chrome  
  - The crash was ultimately found to be caused by a code-gen bug in Visual Studio 2015  

I've run into this kind of thing once myself (sharing a process with other companies is fun!). It was real confusing to get a stack trace showing our code suddenly crashing on a line of code that was doing the exact same thing with the exact same values as it had always done before.

[1]: https://randomascii.wordpress.com/2016/09/16/everything-old-...

[minetest2048]

This also happened in python ecosystem where gevent were messing with numpy because gevent was compiled with -ffast-math, which disables subnormal numbers

Blog post: https://moyix.blogspot.com/2022/09/someones-been-messing-wit... HN discussion: https://news.ycombinator.com/item?id=41212072