Bizzare crashes with kitty

[Techcable]

See kovidgoyal/kitty#4582

Output that seems suspicious from kitty when running as a subprocess:

027 20:43:05.886534] [PARSE ERROR] Unknown OSC code: 1337
[027 20:43:05.886550] [PARSE ERROR] Unknown OSC code: 1337

Is OSC code: 1337 not a valid escape code for kitty?

[Techcable]

The crashes were a kitty issue that they fixed on their end.

Still I'm not sure "OSC code: 1337" is a valid escape for kitty.....