ICE: wrong const argument causes a couple of ICE

[JohnTitor]

This is ICE since 1.50.0, error -> ICE.

playground

struct S;
impl S {
    fn func<'a, U>(self) -> U {
        todo!()
    }
}
fn dont_crash<'a, U>() {
    S.func::<'a, dont_crash>()
}

fn main() {}

Originally posted by @chengniansun in #82792 (comment)

[hameerabbasi]

Bisected:

searched nightlies: from nightly-2020-01-01 to nightly-2021-03-17
regressed nightly: nightly-2020-11-18
searched commits: from f5230fb to c919f49
regressed commit: c6a6105

bisected with cargo-bisect-rustc v0.6.0

Host triple: x86_64-unknown-linux-gnu
Reproduce with:

cargo bisect-rustc --test-dir=. --start=2020-01-01 --regress=ice

[JohnTitor]

Thanks for bisecting, @hameerabbasi! I believe #79032 is the cause.

[lcnr]

Assigning P-medium and removing I-prioritize as discussed in the prioritization working group.

@rustbot label: +P-medium -I-prioritize

[BoxyUwU]

@rustbot claim