Don't trigger unresolved method/field diagnostics on types containing errors

crates/ide-diagnostics/src/handlers/unresolved_field.rs

@@ -129,6 +129,19 @@ fn foo() {
     Foo.bar;
  // ^^^^^^^ 💡 error: no field `bar` on type `Foo`, but a method with a similar name exists
 }
+"#,
+        );
+    }
+
+    #[test]
+    fn no_diagnostic_on_unknown() {
+        check_diagnostics(
+            r#"
+fn foo() {
+    x.foo;
+    (&x).foo;
+    (&((x,),),).foo;
+}
 "#,
         );
     }