Move rc_buffer lint into perf category

clippy_lints/src/lib.rs

@@ -1480,6 +1480,7 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf:
         LintId::of(&types::CHAR_LIT_AS_U8),
         LintId::of(&types::FN_TO_NUMERIC_CAST),
         LintId::of(&types::FN_TO_NUMERIC_CAST_WITH_TRUNCATION),
+        LintId::of(&types::RC_BUFFER),
         LintId::of(&types::REDUNDANT_ALLOCATION),
         LintId::of(&types::TYPE_COMPLEXITY),
         LintId::of(&types::UNIT_ARG),
@@ -1780,6 +1781,7 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf:
         LintId::of(&slow_vector_initialization::SLOW_VECTOR_INITIALIZATION),
         LintId::of(&stable_sort_primitive::STABLE_SORT_PRIMITIVE),
         LintId::of(&types::BOX_VEC),
+        LintId::of(&types::RC_BUFFER),
         LintId::of(&types::REDUNDANT_ALLOCATION),
         LintId::of(&vec::USELESS_VEC),
     ]);
@@ -1805,7 +1807,6 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf:
         LintId::of(&path_buf_push_overwrite::PATH_BUF_PUSH_OVERWRITE),
         LintId::of(&redundant_pub_crate::REDUNDANT_PUB_CRATE),
         LintId::of(&transmute::USELESS_TRANSMUTE),
-        LintId::of(&types::RC_BUFFER),
         LintId::of(&use_self::USE_SELF),
     ]);
 }

clippy_lints/src/types.rs

@@ -241,7 +241,7 @@
     /// fn foo(interned: Rc<str>) { ... }
     /// ```
     pub RC_BUFFER,
-    nursery,
+    perf,
     "shared ownership of a buffer type"
 }
 

src/lintlist/mod.rs

@@ -1853,7 +1853,7 @@
     },
     Lint {
         name: "rc_buffer",
-        group: "nursery",
+        group: "perf",
         desc: "shared ownership of a buffer type",
         deprecation: None,
         module: "types",