```
error: unexpected `cfg` condition name: `rustfmt`
 --> src/gen/is_none.rs:6:13
  |
6 | #![cfg_attr(rustfmt, rustfmt::skip)]
  |             ^^^^^^^
  |
  = help: expected names are: `clippy`, `debug_assertions`, `doc`, `docsrs`, `doctest`, `feature`, `miri`, `overflow_checks`, `panic`, `proc_macro`, `relocation_model`, `sanitize`, `sanitizer_cfi_generalize_pointers`, `sanitizer_cfi_normalize_integers`, `target_abi`, `target_arch`, `target_endian`, `target_env`, `target_family`, `target_feature`, `target_has_atomic`, `target_has_atomic_equal_alignment`, `target_has_atomic_load_store`, `target_os`, `target_pointer_width`, `target_thread_local`, `target_vendor`, `test`, `ub_checks`, `unix`, `windows`
  = help: consider using a Cargo feature instead or adding `println!("cargo::rustc-check-cfg=cfg(rustfmt)");` to the top of the `build.rs`
  = note: see <https://doc.rust-lang.org/nightly/cargo/reference/build-scripts.html#rustc-check-cfg> for more information about checking conditional configuration
  = note: `-D unexpected-cfgs` implied by `-D warnings`
  = help: to override `-D warnings` add `#[allow(unexpected_cfgs)]`

error: unexpected `cfg` condition name: `rustfmt`
 --> src/gen/de.rs:6:13
  |
6 | #![cfg_attr(rustfmt, rustfmt::skip)]
  |             ^^^^^^^
  |
  = help: consider using a Cargo feature instead or adding `println!("cargo::rustc-check-cfg=cfg(rustfmt)");` to the top of the `build.rs`
  = note: see <https://doc.rust-lang.org/nightly/cargo/reference/build-scripts.html#rustc-check-cfg> for more information about checking conditional configuration
```

Due to rust-lang/rust#124735, we cannot
disable this lint at module-level.

rust-lang/rust-clippy#12270

```
error: used import from `std` instead of `core`
  --> src/error.rs:34:40
   |
34 |     WithContext(String, Option<Box<dyn std::error::Error + Send + Sync + 'static>>),
   |                                        ^^^ help: consider importing the item from `core`: `core`
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#std_instead_of_core
   = note: `-D clippy::std-instead-of-core` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(clippy::std_instead_of_core)]`

error: used import from `std` instead of `core`
  --> src/error.rs:66:6
   |
66 | impl std::error::Error for Error {
   |      ^^^ help: consider importing the item from `core`: `core`
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#std_instead_of_core

error: used import from `std` instead of `core`
  --> src/error.rs:67:38
   |
67 |     fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
   |                                      ^^^ help: consider importing the item from `core`: `core`
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#std_instead_of_core

error: used import from `std` instead of `core`
   --> src/error.rs:141:8
    |
141 |     E: std::error::Error + Send + Sync + 'static,
    |        ^^^ help: consider importing the item from `core`: `core`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#std_instead_of_core

error: used import from `std` instead of `core`
  --> src/cfg_expr/error.rs:96:6
   |
96 | impl std::error::Error for ParseError {}
   |      ^^^ help: consider importing the item from `core`: `core`
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#std_instead_of_core

error: used import from `std` instead of `core`
   --> src/resolve.rs:263:17
    |
263 |         T::Err: std::error::Error + Send + Sync + 'static,
    |                 ^^^ help: consider importing the item from `core`: `core`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#std_instead_of_core
```