nix-super/doc/manual/rl-next/filesystem-errors.md

synopsis	issues	prs
wrap filesystem exceptions more correctly		11378

With the switch to std::filesystem in different places, Nix started to throw std::filesystem::filesystem_error in many places instead of its own exceptions.

This lead to no longer generating error traces, for example when listing a non-existing directory, and can also lead to crashes inside the Nix REPL.

This version catches these types of exception correctly and wrap them into Nix's own exeception type.

Author: @Mic92