In fact the somewhat more useful issue is https://github.com/fish-shell/fish-she...

		masklinn on Dec 24, 2020 \| parent \| context \| favorite \| on: Fish is not operational on a VT220 terminal (2015) In fact the somewhat more useful issue is https://github.com/fish-shell/fish-shell/issues/3740 where this problem ended up finally being understood / diagnosed (it's also linked at the very end of TFA).