Notices by Dan Gohman (sunfish@hachyderm.io)

@lanodan

> Wouldn't the problem [...] also apply on the file descriptors passed by the shell?

The shell closes its own fd after doing the `dup2`, so the reference count would go back to 1 before the fd is passed to the new application.

New blog post: Errors from `close`.

Following up on my enormously(?) popular blog post about bugs in hello world, I dive into the electrifying topic of whether the fixed version still has a bug lurking. 🐛

https://blog.sunfishcode.online/errors-from-close/

Random NaN fact: add, sub, mul, div, and sqrt all have ways to return NaN from non-NaN operands.

#AllThingsNaN