tests: add UI test for .swap() suggestion#159719
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…t-swap, r=chenyukang tests: add UI test for `.swap()` suggestion adds a UI test covering the borrow checker diagnostic that suggests using `.swap()` when `std::mem::swap(&mut arr[i], &mut arr[j])` is used. closes rust-lang#159664
This was referenced Jul 23, 2026
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Rollup of 20 pull requests Successful merges: - #150161 (Remove 'static requirement on try_as_dyn) - #159412 (Reorganize `tests/ui/issues` [26/N]) - #159466 (cmse: clear variant-dependent padding in `enum`s) - #157905 (Update comments and add tests for `-Zrandomize-layout` for some guaranteed ZSTs) - #158479 (Reject static item as direct const generic arg) - #159041 (Reorganize `tests/ui/issues` [22/N]) - #159108 (Reorganize `tests/ui/issues` [23/N]) - #159138 (doc: document wasm import symbol mangling) - #159531 (Reorganize `tests/ui/issues` [28/N]) - #159608 (early_otherwise: Don't hoist dereferences when the otherwise branch is reachable) - #159612 (Reorganize `tests/ui/issues` [29/N]) - #159653 (run `tests/assembly-llvm/asm/aarch64-types.rs` for `aarch64_be`) - #159719 (tests: add UI test for `.swap()` suggestion) - #159737 (rustfmt fix: allow file not found errors for external mods annotated with `#[my_macro]`) - #159759 (rustc-dev-guide subtree update) - #159761 (Remove outdated comment for resolve_vars_with_obligations) - #159764 (use `minicore::simd::Simd` more) - #159773 (Remove outdated workaround for `P` type) - #159778 (use lowest edition the test accepts) - #159788 (Avoid ICEing in RPIT method chain suggestion)
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Rollup of 20 pull requests Successful merges: - rust-lang/rust#150161 (Remove 'static requirement on try_as_dyn) - rust-lang/rust#159412 (Reorganize `tests/ui/issues` [26/N]) - rust-lang/rust#159466 (cmse: clear variant-dependent padding in `enum`s) - rust-lang/rust#157905 (Update comments and add tests for `-Zrandomize-layout` for some guaranteed ZSTs) - rust-lang/rust#158479 (Reject static item as direct const generic arg) - rust-lang/rust#159041 (Reorganize `tests/ui/issues` [22/N]) - rust-lang/rust#159108 (Reorganize `tests/ui/issues` [23/N]) - rust-lang/rust#159138 (doc: document wasm import symbol mangling) - rust-lang/rust#159531 (Reorganize `tests/ui/issues` [28/N]) - rust-lang/rust#159608 (early_otherwise: Don't hoist dereferences when the otherwise branch is reachable) - rust-lang/rust#159612 (Reorganize `tests/ui/issues` [29/N]) - rust-lang/rust#159653 (run `tests/assembly-llvm/asm/aarch64-types.rs` for `aarch64_be`) - rust-lang/rust#159719 (tests: add UI test for `.swap()` suggestion) - rust-lang/rust#159737 (rustfmt fix: allow file not found errors for external mods annotated with `#[my_macro]`) - rust-lang/rust#159759 (rustc-dev-guide subtree update) - rust-lang/rust#159761 (Remove outdated comment for resolve_vars_with_obligations) - rust-lang/rust#159764 (use `minicore::simd::Simd` more) - rust-lang/rust#159773 (Remove outdated workaround for `P` type) - rust-lang/rust#159778 (use lowest edition the test accepts) - rust-lang/rust#159788 (Avoid ICEing in RPIT method chain suggestion)
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adds a UI test covering the borrow checker diagnostic that suggests using
.swap()whenstd::mem::swap(&mut arr[i], &mut arr[j])is used.closes #159664