Move map_err_ignore from style to pedantic

clippy_lints/src/lib.rs

@@ -1179,6 +1179,7 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf:
         LintId::of(&loops::EXPLICIT_INTO_ITER_LOOP),
         LintId::of(&loops::EXPLICIT_ITER_LOOP),
         LintId::of(&macro_use::MACRO_USE_IMPORTS),
+        LintId::of(&map_err_ignore::MAP_ERR_IGNORE),
         LintId::of(&match_on_vec_items::MATCH_ON_VEC_ITEMS),
         LintId::of(&matches::MATCH_BOOL),
         LintId::of(&matches::MATCH_WILDCARD_FOR_SINGLE_VARIANTS),
@@ -1330,7 +1331,6 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf:
         LintId::of(&manual_async_fn::MANUAL_ASYNC_FN),
         LintId::of(&manual_non_exhaustive::MANUAL_NON_EXHAUSTIVE),
         LintId::of(&map_clone::MAP_CLONE),
-        LintId::of(&map_err_ignore::MAP_ERR_IGNORE),
         LintId::of(&map_identity::MAP_IDENTITY),
         LintId::of(&map_unit_fn::OPTION_MAP_UNIT_FN),
         LintId::of(&map_unit_fn::RESULT_MAP_UNIT_FN),
@@ -1538,7 +1538,6 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf:
         LintId::of(&manual_async_fn::MANUAL_ASYNC_FN),
         LintId::of(&manual_non_exhaustive::MANUAL_NON_EXHAUSTIVE),
         LintId::of(&map_clone::MAP_CLONE),
-        LintId::of(&map_err_ignore::MAP_ERR_IGNORE),
         LintId::of(&matches::INFALLIBLE_DESTRUCTURING_MATCH),
         LintId::of(&matches::MATCH_LIKE_MATCHES_MACRO),
         LintId::of(&matches::MATCH_OVERLAPPING_ARM),

clippy_lints/src/map_err_ignore.rs

@@ -99,7 +99,7 @@ declare_clippy_lint! {
     /// }
     /// ```
     pub MAP_ERR_IGNORE,
-    style,
+    pedantic,
     "`map_err` should not ignore the original error"
 }
 

src/lintlist/mod.rs

@@ -1167,7 +1167,7 @@ pub static ref ALL_LINTS: Vec<Lint> = vec![
     },
     Lint {
         name: "map_err_ignore",
-        group: "style",
+        group: "pedantic",
         desc: "`map_err` should not ignore the original error",
         deprecation: None,
         module: "map_err_ignore",

tests/ui/map_err.rs

@@ -1,3 +1,4 @@
+#![warn(clippy::map_err_ignore)]
 use std::convert::TryFrom;
 use std::error::Error;
 use std::fmt;

tests/ui/map_err.stderr

@@ -1,5 +1,5 @@
 error: `map_err(|_|...` ignores the original error
-  --> $DIR/map_err.rs:21:32
+  --> $DIR/map_err.rs:22:32
    |
 LL |     println!("{:?}", x.map_err(|_| Errors::Ignored));
    |                                ^^^