build.rs: replace manual Option::filter with .filter() - #1667
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Newer clippy flags `and_then(|x| if cond { None } else { Some(x) })` as
`manual_filter`. Replace with `.filter(|x| !cond)` to satisfy
`-D warnings`.
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Summary
Newer clippy versions flag
and_then(|x| if cond { None } else { Some(x) })with the
manual_filterlint. With-D warningsin CI, this breaks thebuild on newer toolchains.
Replace with
.filter(|x| !cond)inbuild.rs.Verification
cargo clippy --workspace --features=all-apis -- -D warningspasses.