Recover better from illegally named constructors (issue 28807)

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 006350f70ff5690b27d75178f8b6c56bd75f2ce1..edc15ef20156f3a42f17f982f801356e716ba7c7 100644
--- a/pkg/analyzer/test/generated/parser_test.dart
+++ b/pkg/analyzer/test/generated/parser_test.dart
@@ -1670,6 +1670,13 @@ class Foo {
     listener.assertErrorsWithCodes([ParserErrorCode.INVALID_COMMENT_REFERENCE]);
   }
 
+  void test_invalidConstructorName_with() {
+    createParser("C.with();");
+    ClassMember member = parser.parseClassMember('C');
+    expectNotNullIfNoErrors(member);
+    listener.assertErrorsWithCodes([ParserErrorCode.INVALID_CONSTRUCTOR_NAME]);
+  }
+
   void test_invalidHexEscape_invalidDigit() {
     createParser("'\\x0 a'");
     StringLiteral literal = parser.parseStringLiteral();