Don't allow CoerceUnsized into dyn* (except for trait upcasting)
#103386
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r? @nagisa (rust-highfive has picked a reviewer for you, use r? to override) |
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Gotta check if #102429 is fixed by this PR too, I bet so though. |
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CoerceUnsized into dyn*CoerceUnsized into dyn* (except for trait upcasting)
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…iaskrgr Rollup of 8 pull requests Successful merges: - rust-lang#101162 (Migrate rustc_resolve to use SessionDiagnostic, part # 1) - rust-lang#103386 (Don't allow `CoerceUnsized` into `dyn*` (except for trait upcasting)) - rust-lang#103405 (Detect incorrect chaining of if and if let conditions and recover) - rust-lang#103594 (Fix non-associativity of `Instant` math on `aarch64-apple-darwin` targets) - rust-lang#104006 (Add variant_name function to `LangItem`) - rust-lang#104494 (Migrate GUI test to use functions) - rust-lang#104516 (rustdoc: clean up sidebar width CSS) - rust-lang#104550 (fix a typo) Failed merges: - rust-lang#104554 (Use `ErrorGuaranteed::unchecked_claim_error_was_emitted` less) r? `@ghost` `@rustbot` modify labels: rollup
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…iaskrgr Rollup of 8 pull requests Successful merges: - rust-lang#101162 (Migrate rustc_resolve to use SessionDiagnostic, part # 1) - rust-lang#103386 (Don't allow `CoerceUnsized` into `dyn*` (except for trait upcasting)) - rust-lang#103405 (Detect incorrect chaining of if and if let conditions and recover) - rust-lang#103594 (Fix non-associativity of `Instant` math on `aarch64-apple-darwin` targets) - rust-lang#104006 (Add variant_name function to `LangItem`) - rust-lang#104494 (Migrate GUI test to use functions) - rust-lang#104516 (rustdoc: clean up sidebar width CSS) - rust-lang#104550 (fix a typo) Failed merges: - rust-lang#104554 (Use `ErrorGuaranteed::unchecked_claim_error_was_emitted` less) r? `@ghost` `@rustbot` modify labels: rollup
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This makes sure we don't accidentally allow coercions like
Box<T>->Box<dyn* Trait>, or in the case of this ICE,&Tto&dyn* Trait. These coercions don't make sense, at least not via theCoerceUnsizedtrait.Fixes #102172
Fixes #102429