fa1cbac1ea
Ensure that `~const` trait bounds on associated functions are in const traits or impls Zulip discussion: https://rust-lang.zulipchat.com/#narrow/stream/146212-t-compiler.2Fconst-eval/topic/How.20to.2Fshould.20I.20try.20to.20pinpoint.20ICEs.20related.20to.20effects.3F