0dab65b8a1
Make `InferCtxtExt::could_impl_trait` more precise, less ICEy The implementation for `InferCtxtExt::could_impl_trait` was very wrong. Along with being pretty poorly named, way too specific to ADTs, it was also doing impl substitution wrong -- this caused an ICE (#119915). This PR generalizes that code, gives it a clearer name, makes it stop using the new trait solver (lol), and fixes some fallout bad suggestions that are made worse with the code fix. Fixes #119915
The Rust Programming Language
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