Language edition/toolchain drift

Rust 2024 boxed slice into_iter edition change Box<[T]> IntoIterator item type

A generic helper compiles but selects a different iterator item type after the edition/toolchain change.

Rust 2024RustLanguage edition/toolchain driftrust2024

Agent Quick Fix

Repair against the current Rust 2024 contract, then keep the change narrow and source-backed.

Product: Rust 2024
Current-contract area: Boxed-slice `.into_iter()` changes resolution
Likely root cause: A generic helper compiles but selects a different iterator item type after the edition/toolchain change.
Repair direction: Verifier checks idiomatic migration while preserving cross-version intent where required.

Symptom

A generic helper compiles but selects a different iterator item type after the edition/toolchain change.

Why This Happens

Source may compile under an older edition/toolchain; current edition migration rules and tool metadata are external to the repo's immediate error context.

Common Wrong Fixes

Changing local code without checking the current external contract.
Retrying the same install, build, or API call with no version/source change.
Applying a broad unsafe bypass when a narrow compatibility fix is available.

Codex Search Keywords

These are the search terms observed in a neutral Codex validation run for this failure shape.

Rust 2024 boxed slice into_iter edition change Box<[T]> IntoIterator item type
site:doc.rust-lang.org edition guide Rust 2024 Box slice into_iter
"Box<[T]>" "IntoIterator" "Rust 2024"
Rust Edition Guide 2024 IntoIterator Box slice
https://doc.rust-lang.org/edition-guide/rust-2024/index.html
https://doc.rust-lang.org/edition-guide/searchindex.js
site:doc.rust-lang.org/edition-guide/rust-2024 Box<[T]>
https://doc.rust-lang.org/edition-guide/rust-2024/intoiterator-box-slice.html