The current toolchain promoted two test-only patterns to hard errors under
`-D warnings`: integer-to-pointer casts used as non-null dictionary-handle
sentinels, and a repeat/take construction that Clippy now replaces with
`repeat_n`. The casts never represented addresses and were only placeholders
for ownership fields that the cleanup functions must clear. Use the standard
dangling-pointer constructor for those sentinels and the equivalent concise
iterator for the generated test input. Runtime behavior and the ABI are
unchanged, while the repository's Rust lint gate is warning-free again.
Test Plan:
- `cargo clippy --manifest-path rust/Cargo.toml -- -D warnings` -- passed
- `cargo clippy --manifest-path rust/Cargo.toml --benches -- -D warnings` -- passed
- `cargo clippy --manifest-path rust/Cargo.toml --tests -- -D warnings` -- passed
- `cargo clippy --manifest-path rust/cli/Cargo.toml --all-targets -- -D warnings` -- passed
- `cargo +nightly fmt --manifest-path rust/Cargo.toml` -- passed
- `cargo +nightly fmt --manifest-path rust/cli/Cargo.toml` -- passed
ddidderr
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