LYR-IR0001
a construct this compiler version could not lower
Retired.
Each refusal of the lowering says its reason under a code of its own — LYR-SEM0195, LYR-SEM0196, LYR-SEM0197, or LYR-ICE0002 for a construct the checker accepted and the lowering cannot translate.
The lowering's one code for every refusal in earlier versions: what the language does not express yet, what the standard library lacked, and its own bugs, all under one number.