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Normalize after substituting via field.ty() - #89441
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rust-highfive
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Oct 1, 2021
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r? @davidtwco (rust-highfive has picked a reviewer for you, use r? to override) |
tmandry
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Oct 1, 2021
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bors
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Oct 1, 2021
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📌 Commit 68b76a4 has been approved by |
tmandry
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Oct 1, 2021
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@bors rollup |
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Oct 1, 2021
…arth Rollup of 7 pull requests Successful merges: - rust-lang#85223 (rustdoc: Clarified the attribute which prompts the warning) - rust-lang#88847 (platform-support.md: correct ARMv7+MUSL platform triple notes) - rust-lang#88963 (Coerce const FnDefs to implement const Fn traits ) - rust-lang#89376 (Fix use after drop in self-profile with llvm events) - rust-lang#89422 (Replace whitespaces in doctests' name with dashes) - rust-lang#89440 (Clarify a sentence in the documentation of Vec (rust-lang#84488)) - rust-lang#89441 (Normalize after substituting via `field.ty()`) Failed merges: r? `@ghost` `@rustbot` modify labels: rollup
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Oct 7, 2021
…arth Rollup of 7 pull requests Successful merges: - rust-lang#85223 (rustdoc: Clarified the attribute which prompts the warning) - rust-lang#88847 (platform-support.md: correct ARMv7+MUSL platform triple notes) - rust-lang#88963 (Coerce const FnDefs to implement const Fn traits ) - rust-lang#89376 (Fix use after drop in self-profile with llvm events) - rust-lang#89422 (Replace whitespaces in doctests' name with dashes) - rust-lang#89440 (Clarify a sentence in the documentation of Vec (rust-lang#84488)) - rust-lang#89441 (Normalize after substituting via `field.ty()`) Failed merges: r? `@ghost` `@rustbot` modify labels: rollup
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Back in #72476 I hadn't understood where the problem was coming from, and only worked around the issue. What happens is that calling
field.ty()on a field of a generic struct substitutes the appropriate generics but doesn't normalize the resulting type.As a consumer of types I'm surprised that one would substitute without normalizing, feels like a footgun, so I added a comment.
Fixes#89393.