chore(deps): bump rust-toolchain from 1.96.1 to 1.97.0 in /codex-rs

[dependabot]

Bumps rust-toolchain from 1.96.1 to 1.97.0.

Release notes

Sourced from rust-toolchain's releases.

Rust 1.97.0

Language

• Consider Result<T, Uninhabited> and ControlFlow<Uninhabited, T> to be equivalent to T for must use lint
• Add allow-by-default dead_code_pub_in_binary lint for unused pub items in binary crates
• Stabilize the div32, lam-bh, lamcas, ld-seq-sa and scq target features
• Stabilize cfg(target_has_atomic_primitive_alignment)
• Allow trailing self in imports in more cases

Platform Support

• nvptx64-nvidia-cuda: drop support for old architectures and old ISAs

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

Stabilized APIs

• Default for RepeatN
• Copy for ffi::FromBytesUntilNulError
• Send for std::fs::File on UEFI
• <{integer}>::isolate_highest_one
• <{integer}>::isolate_lowest_one
• <{integer}>::highest_one
• <{integer}>::lowest_one
• <{integer}>::bit_width
• NonZero<{integer}>::isolate_highest_one
• NonZero<{integer}>::isolate_lowest_one
• NonZero<{integer}>::highest_one
• NonZero<{integer}>::lowest_one
• NonZero<{integer}>::bit_width

These previously stable APIs are now stable in const contexts:

• char::is_control

Cargo

• Stabilize build.warnings config. This controls how lint warnings from local packages are treated. Useful for enforcing a warning-free build in CI, replacing -Dwarnings. docs
• Stabilize resolver.lockfile-path config. This allows specifying the path to the lockfile to use when resolving dependencies. Useful when working with read-only source directories. docs
• cargo-clean: Error when --target-dir doesn't look like a Cargo target directory. This prevents accidental deletion of non-target directories.
• Add -m shorthand for --manifest-path
• Remove curl dependency from crates-io crate

... (truncated)

Changelog

Sourced from rust-toolchain's changelog.

Version 1.97.0 (2026-07-09)

Language

• Consider Result<T, Uninhabited> and ControlFlow<Uninhabited, T> to be equivalent to T for must use lint
• Add allow-by-default dead_code_pub_in_binary lint for unused pub items in binary crates
• Stabilize the div32, lam-bh, lamcas, ld-seq-sa and scq target features
• Stabilize cfg(target_has_atomic_primitive_alignment)
• Allow trailing self in imports in more cases

Platform Support

• nvptx64-nvidia-cuda: drop support for old architectures and old ISAs

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

Stabilized APIs

• Default for RepeatN
• Copy for ffi::FromBytesUntilNulError
• Send for std::fs::File on UEFI
• <{integer}>::isolate_highest_one
• <{integer}>::isolate_lowest_one
• <{integer}>::highest_one
• <{integer}>::lowest_one
• <{integer}>::bit_width
• NonZero<{integer}>::isolate_highest_one
• NonZero<{integer}>::isolate_lowest_one
• NonZero<{integer}>::highest_one
• NonZero<{integer}>::lowest_one
• NonZero<{integer}>::bit_width

These previously stable APIs are now stable in const contexts:

• char::is_control

... (truncated)

Commits

• 2d8144b Auto merge of #158832 - Mark-Simulacrum:stable-next, r=Mark-Simulacrum
• 1417dc7 Cherry pick mirroring kernel archives in ci-mirrors
• e6ccfb3 Fetch latest relnotes
• 701e471 Bump stable channel
• b2282dd Auto merge of #158630 - weihanglo:beta-cargo-backport, r=weihanglo
• afbfb2f [beta-1.97] Update cargo submodule
• c04e321 Auto merge of #158420 - cuviper:beta-next, r=cuviper
• c93dd3e don't try to remove assignments in SimplifyComparisonIntegral
• d2e3ae1 add test case for miscompilation
• 9a2d041 updating other test error types
• Additional commits viewable in compare view

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[andrei-hasna]

Merge-train status for PR #230: blocked, not merged.

Evidence collected in E2B only:

• Current main/base validated: 0bb27438fc24403821f126ce27dc74c77450dc6b.
• PR head validated: 16e8ffbf4cbc714e5d62761b0c2efb19b9bb63b4.
• Synthetic merge tree: ee107fd1bc7b014957965c00a845e107f5430484.
• Changed file scope: exactly codex-rs/rust-toolchain.toml.
• Toolchain change: channel = "1.97.0"; old 1.96.1 absent in the synthetic merge.
• E2B sandbox: aad656e1-ca33-43a8-81f9-0c914d2e1f21, evidence dir /home/user/pr230-rust197-evidence.
• Rust/Cargo active inside E2B: rustc 1.97.0, cargo 1.97.0.
• Passed: cargo check --locked -p codex-utils-absolute-path.
• Expanded gate status: incomplete. cargo fmt --check completed with warnings only, but cargo check --locked -p codex-core did not complete on the available E2B capacity; process was still running after several minutes with codex_app_server_protocol rustc around 1.1GB RSS.

Decision: do not merge yet. Two independent reviewers classified this PR as CONDITIONAL: the Rust 1.97 bump is desirable in principle, but merge requires expanded E2B validation to pass and a documented rationale for hosted red checks as baseline/external. The current sandbox wrapper does not expose CPU/memory sizing, so this is blocked on stronger remote validation capacity/tooling, not on a known code regression.