Rollup merge of #63227 - jakubadamw:issue-63151, r=estebank

dead_code: Properly inspect fields in struct patterns with type relative paths

Closes #63151.

src/test/ui/type-alias-enum-variants/issue-63151-dead-code-lint-fields-in-patterns.rs

@@ -0,0 +1,26 @@
+// check-pass
+
+// Regression test for the issue #63151:
+// Spurious unused field warning when matching variants under a `Self` scope
+//
+// This test checks that the `dead_code` lint properly inspects fields
+// in struct patterns that use a type relative path.
+
+#![deny(dead_code)]
+
+enum Enum {
+    Variant { field: usize }
+}
+
+impl Enum {
+    fn read_field(self) -> usize {
+        match self {
+            Self::Variant { field } => field
+        }
+    }
+}
+
+fn main() {
+    let e = Enum::Variant { field: 42 };
+    println!("{}", e.read_field());
+}