Fix #3078

clippy_lints/src/non_expressive_names.rs

@@ -114,6 +114,9 @@ impl<'a, 'tcx: 'a, 'b> Visitor<'tcx> for SimilarNamesNameVisitor<'a, 'tcx, 'b> {
             _ => walk_pat(self, pat),
         }
     }
+    fn visit_mac(&mut self, _mac: &Mac) {
+        // do not check macs
+    }
 }
 
 fn get_whitelist(interned_name: &str) -> Option<&'static [&'static str]> {

tests/ui/non_expressive_names.rs

@@ -147,6 +147,13 @@ fn issue2927() {
   format!("{:?}", 2);
 }
 
+fn issue3078() {
+    match "a" {
+        stringify!(a) => {},
+        _ => {}
+    }
+}
+
 struct Bar;
 
 impl Bar {

tests/ui/non_expressive_names.stderr

@@ -150,21 +150,21 @@ error: consider choosing a more descriptive name
     |         ^^^^^^^
 
 error: consider choosing a more descriptive name
-   --> $DIR/non_expressive_names.rs:154:13
+   --> $DIR/non_expressive_names.rs:161:13
     |
-154 |         let _1 = 1;
+161 |         let _1 = 1;
     |             ^^
 
 error: consider choosing a more descriptive name
-   --> $DIR/non_expressive_names.rs:155:13
+   --> $DIR/non_expressive_names.rs:162:13
     |
-155 |         let ____1 = 1;
+162 |         let ____1 = 1;
     |             ^^^^^
 
 error: consider choosing a more descriptive name
-   --> $DIR/non_expressive_names.rs:156:13
+   --> $DIR/non_expressive_names.rs:163:13
     |
-156 |         let __1___2 = 12;
+163 |         let __1___2 = 12;
     |             ^^^^^^^
 
 error: aborting due to 17 previous errors