Add additional missing lint handling logic

compiler/rustc_expand/src/expand.rs

@@ -12,7 +12,7 @@
 use rustc_ast::token;
 use rustc_ast::tokenstream::TokenStream;
 use rustc_ast::visit::{self, AssocCtxt, Visitor};
-use rustc_ast::{AstLike, Block, Inline, ItemKind, MacArgs};
+use rustc_ast::{AstLike, Block, Inline, ItemKind, Local, MacArgs};
 use rustc_ast::{MacCallStmt, MacStmtStyle, MetaItemKind, ModKind, NestedMetaItem};
 use rustc_ast::{NodeId, PatKind, Path, StmtKind, Unsafe};
 use rustc_ast_pretty::pprust;
@@ -1161,6 +1161,11 @@ fn visit_expr(&mut self, expr: &mut P<ast::Expr>) {
         });
     }
 
+    // This is needed in order to set `lint_node_id` for `let` statements
+    fn visit_local(&mut self, local: &mut P<Local>) {
+        assign_id!(self, &mut local.id, || noop_visit_local(local, self));
+    }
+
     fn flat_map_arm(&mut self, arm: ast::Arm) -> SmallVec<[ast::Arm; 1]> {
         let mut arm = configure!(self, arm);
 
@@ -1307,6 +1312,8 @@ fn visit_pat(&mut self, pat: &mut P<ast::Pat>) {
         }
 
         // The placeholder expander gives ids to statements, so we avoid folding the id here.
+        // We don't use `assign_id!` - it will be called when we visit statement's contents
+        // (e.g. an expression, item, or local)
         let ast::Stmt { id, kind, span } = stmt;
         noop_flat_map_stmt_kind(kind, self)
             .into_iter()

compiler/rustc_lint/src/early.rs

@@ -210,8 +210,10 @@ fn visit_block(&mut self, b: &'a ast::Block) {
     }
 
     fn visit_arm(&mut self, a: &'a ast::Arm) {
-        run_early_pass!(self, check_arm, a);
-        ast_visit::walk_arm(self, a);
+        self.with_lint_attrs(a.id, &a.attrs, |cx| {
+            run_early_pass!(cx, check_arm, a);
+            ast_visit::walk_arm(cx, a);
+        })
     }
 
     fn visit_expr_post(&mut self, e: &'a ast::Expr) {

src/test/ui/asm/inline-syntax.x86_64.stderr

@@ -1,10 +1,16 @@
+warning: avoid using `.intel_syntax`, Intel syntax is the default
+  --> $DIR/inline-syntax.rs:57:14
+   |
+LL | global_asm!(".intel_syntax noprefix", "nop");
+   |              ^^^^^^^^^^^^^^^^^^^^^^
+   |
+   = note: `#[warn(bad_asm_style)]` on by default
+
 warning: avoid using `.intel_syntax`, Intel syntax is the default
   --> $DIR/inline-syntax.rs:31:15
    |
 LL |         asm!(".intel_syntax noprefix", "nop");
    |               ^^^^^^^^^^^^^^^^^^^^^^
-   |
-   = note: `#[warn(bad_asm_style)]` on by default
 
 warning: avoid using `.intel_syntax`, Intel syntax is the default
   --> $DIR/inline-syntax.rs:34:15
@@ -36,11 +42,5 @@ warning: avoid using `.intel_syntax`, Intel syntax is the default
 LL |             .intel_syntax noprefix
    |             ^^^^^^^^^^^^^^^^^^^^^^
 
-warning: avoid using `.intel_syntax`, Intel syntax is the default
-  --> $DIR/inline-syntax.rs:57:14
-   |
-LL | global_asm!(".intel_syntax noprefix", "nop");
-   |              ^^^^^^^^^^^^^^^^^^^^^^
-
 warning: 7 warnings emitted