Avoid final override ICE for RPITIT associated types#158841
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rust-bors[bot] merged 2 commits intoJul 8, 2026
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r? @mejrs rustbot has assigned @mejrs. Use Why was this reviewer chosen?The reviewer was selected based on:
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Does this mean that rpitit's inherit the defaultness of the function that defines it? |
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@mejrs Yes. RPITITs are lowered to synthetic anonymous associated types, and rustc copies the containing function’s defaultness onto that associated type here: rust/compiler/rustc_ty_utils/src/assoc.rs Line 269 in c952d72 |
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That code was written before |
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@mejrs I investigated it, but couldn't find evidence that this was explicitly considered when That said, inheriting |
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…ice, r=mejrs Avoid final override ICE for RPITIT associated types Fixes rust-lang#158824 `check_overriding_final_trait_item` was running for every associated item in an impl, including the synthetic anonymous associated type generated for RPITIT.
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…ice, r=mejrs Avoid final override ICE for RPITIT associated types Fixes rust-lang#158824 `check_overriding_final_trait_item` was running for every associated item in an impl, including the synthetic anonymous associated type generated for RPITIT.
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…uwer Rollup of 18 pull requests Successful merges: - #157385 (Enable Enzyme on x86_64-apple) - #157561 (rustdoc: do not include extra stuff in span) - #158179 (std: unconditionally use `preadv`/`pwritev` on AArch64 macOS) - #158617 (allow mGCA const arguments to fall back to anon consts) - #158621 (disallow `extern "custom"` on wasm and spirv targets) - #158690 (delegation: support mapping of all arguments with `Self` type) - #158696 (Rename some `body_id` to `body_def_id`) - #158697 (Fixes for QNX SDP 8) - #158760 (Clarify that `LocalKey::try_with` may return `AccessError`) - #157801 (Rewrite safety requirements for `Allocator` impls) - #158333 (Fix typetree generation for differentiated functions) - #158646 (powerpc64le_unknown_freebsd.rs: link with -lgcc) - #158701 ( diagnostics: suggest type annotation for closure params on HRTB FnOnce mismatch) - #158791 (Avoid unused braces lint for macro generated arguments) - #158802 (Use `ci-mirrors` in `armhf-gnu` for {busybox, ubuntu rootfs} artifacts) - #158841 (Avoid final override ICE for RPITIT associated types) - #158889 (tests: catch up with LLVM returning f128 on the stack) - #158905 (delegation: add constraints to new generic args)
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…uwer Rollup of 19 pull requests Successful merges: - #156016 (view-types: store view types in the AST) - #157385 (Enable Enzyme on x86_64-apple) - #158179 (std: unconditionally use `preadv`/`pwritev` on AArch64 macOS) - #158621 (disallow `extern "custom"` on wasm and spirv targets) - #158690 (delegation: support mapping of all arguments with `Self` type) - #158696 (Rename some `body_id` to `body_def_id`) - #158697 (Fixes for QNX SDP 8) - #158760 (Clarify that `LocalKey::try_with` may return `AccessError`) - #157801 (Rewrite safety requirements for `Allocator` impls) - #158085 (rustdoc: Fix sidebar heading order) - #158333 (Fix typetree generation for differentiated functions) - #158646 (powerpc64le_unknown_freebsd.rs: link with -lgcc) - #158701 ( diagnostics: suggest type annotation for closure params on HRTB FnOnce mismatch) - #158791 (Avoid unused braces lint for macro generated arguments) - #158802 (Use `ci-mirrors` in `armhf-gnu` for {busybox, ubuntu rootfs} artifacts) - #158841 (Avoid final override ICE for RPITIT associated types) - #158889 (tests: catch up with LLVM returning f128 on the stack) - #158905 (delegation: add constraints to new generic args) - #158922 (tests: clean up over-constraint on LLVM feature count) Failed merges: - #158617 (allow mGCA const arguments to fall back to anon consts)
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Fixes #158824
check_overriding_final_trait_itemwas running for every associated item in an impl, including the synthetic anonymous associated type generated for RPITIT.