Comment 4 for bug 1887913

stderr (or any stream for that matter) can be bound to a file descriptor which is can be deleted externally.

To reproduce, see the original post recipe: by exiting the shell, we delete the standard error file descriptor. This raises a condition in the Common Lisp process when it tries to write there.

Ideally, I'd like to know if there is a way to prevent such conditions being raised. A handler-bind is not always an option, especially when libraries start other threads themselves, which may in turn raise this condition.