Fix recovery to prevent generating a parameter with no name and no type (issue 30020)

pkg/analyzer/test/generated/parser_test.dart

Index: pkg/analyzer/test/generated/parser_test.dart
diff --git a/pkg/analyzer/test/generated/parser_test.dart b/pkg/analyzer/test/generated/parser_test.dart
index 57be2145924e32600f8fa2c00dabd32554017d6d..f1d872eb6b7509e189c74e72e847ed477d8917b8 100644
--- a/pkg/analyzer/test/generated/parser_test.dart
+++ b/pkg/analyzer/test/generated/parser_test.dart
@@ -2896,6 +2896,16 @@ class Foo {
         "void f(var x()) {}", [ParserErrorCode.FUNCTION_TYPED_PARAMETER_VAR]);
   }
 
+  void test_genericFunctionType_extraLessThan() {
+    createParser('''
+class Wrong<T> {
+  T Function(<List<int> foo) bar;
+}''');
+    CompilationUnit unit = parser.parseCompilationUnit2();
+    expectNotNullIfNoErrors(unit);
+    listener.assertErrorsWithCodes([ParserErrorCode.UNEXPECTED_TOKEN]);
+  }
+
   void test_getterInFunction_block_noReturnType() {
     FunctionDeclarationStatement statement =
         parseStatement("get x { return _x; }");