Issue 27300. Report HintCode.ABSTRACT_SUPER_MEMBER_REFERENCE.

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 a24bd1e811d0983e3960621a2267bb28eed46501..f986b355526a5b8e79000a8a5fbf931954cccf08 100644
--- a/pkg/analyzer/lib/src/generated/resolver.dart
+++ b/pkg/analyzer/lib/src/generated/resolver.dart
@@ -52,7 +52,7 @@ class BestPracticesVerifier extends RecursiveAstVisitor<Object> {
    * The class containing the AST nodes being visited, or `null` if we are not in the scope of
    * a class.
    */
-  ClassElement _enclosingClass;
+  ClassElementImpl _enclosingClass;
 
   /**
    * A flag indicating whether a surrounding member (compilation unit or class)
@@ -87,12 +87,17 @@ class BestPracticesVerifier extends RecursiveAstVisitor<Object> {
   LibraryElement _currentLibrary;
 
   /**
+   * The inheritance manager used to find overridden methods.
+   */
+  InheritanceManager _manager;
+
+  /**
    * Create a new instance of the [BestPracticesVerifier].
    *
    * @param errorReporter the error reporter
    */
-  BestPracticesVerifier(
-      this._errorReporter, TypeProvider typeProvider, this._currentLibrary,
+  BestPracticesVerifier(this._errorReporter, TypeProvider typeProvider,
+      this._currentLibrary, this._manager,
       {TypeSystem typeSystem})
       : _nullType = typeProvider.nullType,
         _futureNullType = typeProvider.futureNullType,
@@ -159,9 +164,9 @@ class BestPracticesVerifier extends RecursiveAstVisitor<Object> {
 
   @override
   Object visitClassDeclaration(ClassDeclaration node) {
-    ClassElement outerClass = _enclosingClass;
+    ClassElementImpl outerClass = _enclosingClass;
     bool wasInDeprecatedMember = inDeprecatedMember;
-    ClassElement element = node.element;
+    ClassElement element = AbstractClassElementImpl.getImpl(node.element);
     if (element != null && element.isDeprecated) {
       inDeprecatedMember = true;
     }
@@ -283,8 +288,10 @@ class BestPracticesVerifier extends RecursiveAstVisitor<Object> {
 
   @override
   Object visitMethodInvocation(MethodInvocation node) {
+    Expression realTarget = node.realTarget;
+    _checkForAbstractSuperMemberReference(realTarget, node.methodName);
     _checkForCanBeNullAfterNullAware(
-        node.realTarget, node.operator, null, node.methodName);
+        realTarget, node.operator, null, node.methodName);
     DartType staticInvokeType = node.staticInvokeType;
     if (staticInvokeType is InterfaceType) {
       MethodElement methodElement = staticInvokeType.lookUpMethod(
@@ -308,8 +315,10 @@ class BestPracticesVerifier extends RecursiveAstVisitor<Object> {
 
   @override
   Object visitPropertyAccess(PropertyAccess node) {
+    Expression realTarget = node.realTarget;
+    _checkForAbstractSuperMemberReference(realTarget, node.propertyName);
     _checkForCanBeNullAfterNullAware(
-        node.realTarget, node.operator, node.propertyName, null);
+        realTarget, node.operator, node.propertyName, null);
     return super.visitPropertyAccess(node);
   }
 
@@ -409,6 +418,34 @@ class BestPracticesVerifier extends RecursiveAstVisitor<Object> {
     return false;
   }
 
+  void _checkForAbstractSuperMemberReference(
+      Expression target, SimpleIdentifier name) {
+    if (target is SuperExpression) {
+      Element element = name.staticElement;
+      if (element is ExecutableElement && element.isAbstract) {
+        if (!_enclosingClass.hasNoSuchMethod) {
+          ExecutableElement concrete = null;
+          if (element.kind == ElementKind.METHOD) {
+            concrete = _enclosingClass.lookUpInheritedConcreteMethod(
+                element.displayName, _currentLibrary);
+          } else if (element.kind == ElementKind.GETTER) {
+            concrete = _enclosingClass.lookUpInheritedConcreteGetter(
+                element.displayName, _currentLibrary);
+          } else if (element.kind == ElementKind.SETTER) {
+            concrete = _enclosingClass.lookUpInheritedConcreteSetter(
+                element.displayName, _currentLibrary);
+          }
+          if (concrete == null) {
+            _errorReporter.reportTypeErrorForNode(
+                HintCode.ABSTRACT_SUPER_MEMBER_REFERENCE,
+                name,
+                [element.kind.displayName, name.name]);
+          }
+        }
+      }
+    }
+  }
+
   /**
    * This verifies that the passed expression can be assigned to its corresponding parameters.
    *
@@ -4291,7 +4328,7 @@ class HintGenerator {
     }
     // Dart best practices
     unit.accept(new BestPracticesVerifier(
-        errorReporter, _context.typeProvider, _library,
+        errorReporter, _context.typeProvider, _library, _manager,
         typeSystem: _context.typeSystem));
     unit.accept(new OverrideVerifier(errorReporter, _manager));
     // Find to-do comments
@@ -7283,8 +7320,13 @@ class ResolverVisitor extends ScopedVisitor {
           originalType is FunctionType &&
           originalType.typeFormals.isNotEmpty &&
           ts is StrongTypeSystemImpl) {
-        contextType = ts.inferGenericFunctionCall(typeProvider, originalType,
-            DartType.EMPTY_LIST, DartType.EMPTY_LIST, originalType.returnType, returnContextType);
+        contextType = ts.inferGenericFunctionCall(
+            typeProvider,
+            originalType,
+            DartType.EMPTY_LIST,
+            DartType.EMPTY_LIST,
+            originalType.returnType,
+            returnContextType);
       }
 
       InferenceContext.setType(node.argumentList, contextType);