Rollup merge of rust-lang#119819 - chenyukang:yukang-fix-118183-lint, r=davidtwco

Check rust lints when an unknown lint is detected

Fixes rust-lang#118183

Author: GuillaumeGomez

tests/ui/unknown_clippy_lints.fixed

@@ -7,10 +7,12 @@
 #[warn(clippy::if_not_else)]
 #[warn(clippy::unnecessary_cast)]
 #[warn(clippy::useless_transmute)]
-// Shouldn't suggest rustc lint name(`dead_code`)
-#[warn(clippy::eq_op)]
+// Should suggest rustc lint name(`dead_code`)
+#[warn(dead_code)]
 // Shouldn't suggest removed/deprecated clippy lint name(`unused_collect`)
 #[warn(clippy::unused_self)]
 // Shouldn't suggest renamed clippy lint name(`const_static_lifetime`)
 #[warn(clippy::redundant_static_lifetimes)]
+// issue #118183, should report `missing_docs` from rustc lint
+#[warn(missing_docs)]
 fn main() {}

tests/ui/unknown_clippy_lints.rs

@@ -7,10 +7,12 @@
 #[warn(clippy::if_not_els)]
 #[warn(clippy::UNNecsaRy_cAst)]
 #[warn(clippy::useles_transute)]
-// Shouldn't suggest rustc lint name(`dead_code`)
+// Should suggest rustc lint name(`dead_code`)
 #[warn(clippy::dead_cod)]
 // Shouldn't suggest removed/deprecated clippy lint name(`unused_collect`)
 #[warn(clippy::unused_colle)]
 // Shouldn't suggest renamed clippy lint name(`const_static_lifetime`)
 #[warn(clippy::const_static_lifetim)]
+// issue #118183, should report `missing_docs` from rustc lint
+#[warn(clippy::missing_docs)]
 fn main() {}

tests/ui/unknown_clippy_lints.stderr

@@ -35,7 +35,12 @@ error: unknown lint: `clippy::dead_cod`
   --> $DIR/unknown_clippy_lints.rs:11:8
    |
 LL | #[warn(clippy::dead_cod)]
-   |        ^^^^^^^^^^^^^^^^ help: did you mean: `clippy::eq_op`
+   |        ^^^^^^^^^^^^^^^^
+   |
+help: a lint with a similar name exists in `rustc` lints
+   |
+LL | #[warn(dead_code)]
+   |        ~~~~~~~~~
 
 error: unknown lint: `clippy::unused_colle`
   --> $DIR/unknown_clippy_lints.rs:13:8
@@ -49,5 +54,16 @@ error: unknown lint: `clippy::const_static_lifetim`
 LL | #[warn(clippy::const_static_lifetim)]
    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: did you mean: `clippy::redundant_static_lifetimes`
 
-error: aborting due to 8 previous errors
+error: unknown lint: `clippy::missing_docs`
+  --> $DIR/unknown_clippy_lints.rs:17:8
+   |
+LL | #[warn(clippy::missing_docs)]
+   |        ^^^^^^^^^^^^^^^^^^^^
+   |
+help: a lint with a similar name exists in `rustc` lints
+   |
+LL | #[warn(missing_docs)]
+   |        ~~~~~~~~~~~~
+
+error: aborting due to 9 previous errors