Fix some cross-crate unboxed closure bugs #18546
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Closes rust-lang#18378. Note that cross-crate unboxed closures are still unimplemented and will fail to work currently.
Always translate the ID into the local crate ID space since presently the only way to encounter an unboxed closure type from another crate is to inline once of its functions. This may need to change if abstract return types are added. Closes rust-lang#18543
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…=nick29581 This fixes some metadata/AST encoding problems that lead to ICEs. The way this is currently handled will need revisiting if abstract return types are added, as unboxed closure types from extern crates could show up without being inlined into the local crate. Closes #16790 (I think this was fixed earlier by accident and just needed a test case) Closes #18378 Closes #18543 r? @pcwalton
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This fixes some metadata/AST encoding problems that lead to ICEs. The way this is currently handled will need revisiting if abstract return types are added, as unboxed closure types from extern crates could show up without being inlined into the local crate.
Closes #16790 (I think this was fixed earlier by accident and just needed a test case)
Closes #18378
Closes #18543
r? @pcwalton