ICE involving references to dyn* #102429
Description
Example:
#![feature(dyn_star)] #![allow(incomplete_features)] trait AddOne { fn add1(&mut self) -> usize; } impl AddOne for usize { fn add1(&mut self) -> usize { *self += 1; *self } } fn add_one(i: &mut dyn* AddOne) -> usize { i.add1() } fn main() { let x = 42 as dyn* AddOne; println!("{}", add_one(&mut x)); println!("{}", add_one(&mut x)); }This fails with the following ICE:
error: internal compiler error: compiler/rustc_trait_selection/src/traits/select/confirmation.rs:1148:18: impossible case reached