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Matthias Krüger
762a661705
do not constrain infer vars in `find_best_leaf_obligation` This ended up causing an ICE by making the following code path reachable by incorrectly constraining an inference variable while computing the best obligation for a preceding ambiguity. Closes #129444. https://github.com/rust-lang/rust/blob/f2abf827c128120ed7a874d02973947968c158b8/compiler/rustc_trait_selection/src/solve/fulfill.rs#L312-L314 I have to be honest, I don't fully understand how that change removes all the additional diagnostics :3 r? `@compiler-errors`