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2020-07-15Don't ICE on errors in function returning impl traitJoshua Nelson-0/+14
Instead, report the error. This emits the errors on-demand, without special-casing `impl Trait`, so it should catch all ICEs of this kind, including ones that haven't been found yet. Since the error is emitted during type-checking there is less info about the error; see comments in the code for details. - Add test case for -> impl Trait - Add test for impl trait with alias - Move EmitIgnoredResolutionErrors to rustdoc This makes `fn typeck_item_bodies` public, which is not desired behavior. That change should be removed once https://github.com/rust-lang/rust/pull/74070 is merged. - Don't visit nested closures twice