Identifiers with ExtensionElement don't have types.

[email protected]

Change-Id: I9134982c56006467314e335d1ca1c8f3982ac4dd
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/114557
Reviewed-by: Brian Wilkerson <[email protected]>
Commit-Queue: Konstantin Shcheglov <[email protected]>

Author: scheglov

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

@@ -839,6 +839,11 @@ class StaticTypeAnalyzer extends SimpleAstVisitor<void> {
   void visitPrefixedIdentifier(PrefixedIdentifier node) {
     SimpleIdentifier prefixedIdentifier = node.identifier;
     Element staticElement = prefixedIdentifier.staticElement;
+
+    if (staticElement is ExtensionElement) {
+      return;
+    }
+
     DartType staticType = _dynamicType;
     if (staticElement is ClassElement) {
       if (_isNotTypeLiteral(node)) {
@@ -1072,6 +1077,11 @@ class StaticTypeAnalyzer extends SimpleAstVisitor<void> {
   @override
   void visitSimpleIdentifier(SimpleIdentifier node) {
     Element element = node.staticElement;
+
+    if (element is ExtensionElement) {
+      return;
+    }
+
     DartType staticType = _dynamicType;
     if (element is ClassElement) {
       if (_isNotTypeLiteral(node)) {

pkg/analyzer/test/src/dart/resolution/ast_rewrite_test.dart

@@ -382,6 +382,10 @@ f(prefix.A a) {
     @required String expectedExtendedType,
   }) {
     expect(override.staticElement, expectedElement);
+
+    assertTypeNull(override);
+    assertTypeNull(override.extensionName);
+
     assertElementTypeStrings(
       override.typeArgumentTypes,
       expectedTypeArguments,

pkg/analyzer/test/src/dart/resolution/extension_override_test.dart

@@ -556,6 +556,10 @@ f(C c) => E(c).a;
 
   void validateOverride({List<DartType> typeArguments}) {
     expect(extensionOverride.extensionName.staticElement, extension);
+
+    expect(extensionOverride.staticType, isNull);
+    expect(extensionOverride.extensionName.staticType, isNull);
+
     if (typeArguments == null) {
       expect(extensionOverride.typeArguments, isNull);
     } else {