Issue 26787. Report HintCode.OVERRIDE_ON_NON_OVERRIDING_GETTER for non-overriding fields.

pkg/analyzer/lib/src/generated/resolver.dart

Index: pkg/analyzer/lib/src/generated/resolver.dart
diff --git a/pkg/analyzer/lib/src/generated/resolver.dart b/pkg/analyzer/lib/src/generated/resolver.dart
index d9d0b0d96d7516c8038bd2f9636f4bd63904f391..8b583239440b30e4cd1d90517f083dc7cfe9abe2 100644
--- a/pkg/analyzer/lib/src/generated/resolver.dart
+++ b/pkg/analyzer/lib/src/generated/resolver.dart
@@ -5161,6 +5161,21 @@ class OverrideVerifier extends RecursiveAstVisitor<Object> {
   OverrideVerifier(this._errorReporter, this._manager);
 
   @override
+  Object visitFieldDeclaration(FieldDeclaration node) {
+    for (VariableDeclaration field in node.fields.variables) {
+      VariableElement fieldElement = field.element;
+      if (fieldElement is FieldElement && _isOverride(fieldElement)) {
+        PropertyAccessorElement getterElement = fieldElement.getter;
+        if (_getOverriddenMember(getterElement) == null) {
+          _errorReporter.reportErrorForNode(
+              HintCode.OVERRIDE_ON_NON_OVERRIDING_GETTER, field.name);
+        }
+      }
+    }
+    return super.visitFieldDeclaration(node);
+  }
+
+  @override
   Object visitMethodDeclaration(MethodDeclaration node) {
     ExecutableElement element = node.element;
     if (_isOverride(element)) {