warning: this `map_or` can be simplified
      --> build.rs:76:38
       |
    76 |     if cfg!(not(feature = "std")) && rustc.map_or(false, |rustc| rustc < 81) {
       |                                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
       |
       = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_map_or
       = note: `-W clippy::unnecessary-map-or` implied by `-W clippy::all`
       = help: to override `-W clippy::all` add `#[allow(clippy::unnecessary_map_or)]`
    help: use `is_some_and` instead
       |
    76 -     if cfg!(not(feature = "std")) && rustc.map_or(false, |rustc| rustc < 81) {
    76 +     if cfg!(not(feature = "std")) && rustc.is_some_and(|rustc| rustc < 81) {
       |

    warning: this `map_or` can be simplified
       --> impl/src/expand.rs:385:13
        |
    385 | /             v.attrs
    386 | |                 .display
    387 | |                 .as_ref()
    388 | |                 .map_or(false, |display| display.has_bonus_display)
        | |___________________________________________________________________^
        |
        = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_map_or
        = note: `-W clippy::unnecessary-map-or` implied by `-W clippy::all`
        = help: to override `-W clippy::all` add `#[allow(clippy::unnecessary_map_or)]`
    help: use `is_some_and` instead
        |
    388 -                 .map_or(false, |display| display.has_bonus_display)
    388 +                 .is_some_and(|display| display.has_bonus_display)
        |

    warning: this `map_or` can be simplified
       --> impl/src/prop.rs:131:8
        |
    131 |       if from_field.map_or(false, |from_field| {
        |  ________^
    132 | |         from_field.member == backtrace_field.member
    133 | |     }) {
        | |______^
        |
        = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_map_or
    help: use `is_some_and` instead
        |
    131 -     if from_field.map_or(false, |from_field| {
    131 +     if from_field.is_some_and(|from_field| {
        |

    warning: this `map_or` can be simplified
       --> impl/src/valid.rs:242:32
        |
    242 |           Type::Reference(ty) => ty
        |  ________________________________^
    243 | |             .lifetime
    244 | |             .as_ref()
    245 | |             .map_or(false, |lifetime| lifetime.ident != "static"),
        | |_________________________________________________________________^
        |
        = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_map_or
    help: use `is_some_and` instead
        |
    245 -             .map_or(false, |lifetime| lifetime.ident != "static"),
    245 +             .is_some_and(|lifetime| lifetime.ident != "static"),
        |

Superseded by `rust-version` metadata in Cargo.toml.

Fixed in nightly-2026-02-13.

chore: improve thiserror maintenance path

    warning: adding items after statements is confusing, since items exist from the start of the scope
      --> tests/test_transparent.rs:89:5
       |
    89 |     struct WithSource(#[source] io::Error);
       |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
       |
       = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#items_after_statements
       = note: `-W clippy::items-after-statements` implied by `-W clippy::pedantic`
       = help: to override `-W clippy::pedantic` add `#[allow(clippy::items_after_statements)]`