ICE: assertion failed: !hidden_types.has_erased_regions()

[saethlin]

I might be able to git bisect this tomorrow, unfortunately cargo-bisect-rustc can't help because this is a debug assertion.

cargo +stage1 install cargo-nextest --force

Starts at least on this commit:

ca62d2c445628587660ae48013f460b08b1f5552

Error output

thread 'rustc' panicked at compiler/rustc_trait_selection/src/traits/select/mod.rs:3119:9:
assertion failed: !hidden_types.has_erased_regions()

rustc-ice-2023-10-01T04:39:24.992139512Z-887849.txt

[lqd]

unfortunately cargo-bisect-rustc can't help because this is a debug assertion

I don't know about you, but I'm not sure we're getting everything we'd want out of the alt builds. I rarely hear about them, and especially not when they could have helped, like here: maybe enough time has passed by now to say debug assertions should also be turned on in the alt builds?

Anyway, I believe cargo-nextest-0.9.59 started triggering this assert in release mode with 286502c from #107421.

[lqd]

This should have been fixed by #116452, can this issue be closed?

[saethlin]

Yes, can confirm it's fixed.