Bump rust-toolchain from 1.87.0 to 1.93.1

[dependabot]

Bumps rust-toolchain from 1.87.0 to 1.93.1.

Release notes

Sourced from rust-toolchain's releases.

Rust 1.93.1

• Don't try to recover keyword as non-keyword identifier, fixing an ICE that especially affected rustfmt.
• Fix clippy::panicking_unwrap false-positive on field access with implicit deref.
• Revert "Update wasm-related dependencies in CI", fixing file descriptor leaks on the wasm32-wasip2 target.

Rust 1.93.0

Language

• Stabilize several s390x vector-related target features and the is_s390x_feature_detected! macro
• Stabilize declaration of C-style variadic functions for the system ABI
• Emit error when using some keyword as a cfg predicate
• Stabilize asm_cfg
• During const-evaluation, support copying pointers byte-by-byte
• LUB coercions now correctly handle function item types, and functions with differing safeties
• Allow const items that contain mutable references to static (which is very unsafe, but not always UB)
• Add warn-by-default const_item_interior_mutations lint to warn against calls which mutate interior mutable const items
• Add warn-by-default function_casts_as_integer lint

Compiler

• Stabilize -Cjump-tables=bool. The flag was previously called -Zno-jump-tables.

Platform Support

• Promote riscv64a23-unknown-linux-gnu to Tier 2 (without host tools)

Refer to Rust's platform support page for more information on Rust's tiered platform support.

Libraries

• Stop internally using specialization on the Copy trait as it is unsound in the presence of lifetime dependent Copy implementations. This may result in some performance regressions as some standard library APIs may now call Clone::clone instead of performing bitwise copies
• Allow the global allocator to use thread-local storage and std::thread::current()
• Make BTree::append not update existing keys when appending an entry which already exists
• Don't require T: RefUnwindSafe for vec::IntoIter<T>: UnwindSafe

Stabilized APIs

• <[MaybeUninit<T>]>::assume_init_drop

... (truncated)

Changelog

Sourced from rust-toolchain's changelog.

Version 1.93.1 (2026-02-12)

• Don't try to recover keyword as non-keyword identifier, fixing an ICE that especially affected rustfmt.
• Fix clippy::panicking_unwrap false-positive on field access with implicit deref.
• Revert "Update wasm-related dependencies in CI", fixing file descriptor leaks on the wasm32-wasip2 target.

Version 1.93.0 (2026-01-22)

Language

• Stabilize several s390x vector-related target features and the is_s390x_feature_detected! macro
• Stabilize declaration of C-style variadic functions for the system ABI
• Emit error when using some keyword as a cfg predicate
• Stabilize asm_cfg
• During const-evaluation, support copying pointers byte-by-byte
• LUB coercions now correctly handle function item types, and functions with differing safeties
• Allow const items that contain mutable references to static (which is very unsafe, but not always UB)
• Add warn-by-default const_item_interior_mutations lint to warn against calls which mutate interior mutable const items
• Add warn-by-default function_casts_as_integer lint

Compiler

• Stabilize -Cjump-tables=bool. The flag was previously called -Zno-jump-tables.

Platform Support

• Promote riscv64a23-unknown-linux-gnu to Tier 2 (without host tools)

Refer to Rust's platform support page for more information on Rust's tiered platform support.

Libraries

• Stop internally using specialization on the Copy trait as it is unsound in the presence of lifetime dependent Copy implementations. This may result in some performance regressions as some standard library APIs may now call Clone::clone instead of performing bitwise copies

... (truncated)

Commits

• 01f6ddf Auto merge of #152450 - cuviper:stable-next, r=cuviper
• 674ccdd Release 1.93.1
• f0867bf Sync release note changes from main
• b8cc170 Remove the 4 failing tests from rustdoc-gui
• 128b1c9 Remove rustdoc GUI flaky test
• f8cf317 Revert "Update wasm-related dependencies in CI"
• 9c13ace fix: panicking_unwrap FP on field access with implicit deref
• feb759b Don't try to recover keyword as non-keyword identifier
• f691f9a Add regression tests for keyword-in-identifier-position recovery ICE
• 254b596 Auto merge of #151369 - Mark-Simulacrum:stable-next, r=Mark-Simulacrum
• Additional commits viewable in compare view

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[dependabot]

Superseded by #7.