Disallow subtyping class Record.

Change-Id: I5f71e47cc0c60444cf0c7baebb4e9e9d3f105ef0
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/257921
Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>
Commit-Queue: Konstantin Shcheglov <scheglov@google.com>
Reviewed-by: Samuel Rawlins <srawlins@google.com>

pkg/analyzer/lib/src/dart/element/type_provider.dart

@@ -31,6 +31,7 @@ const Set<String> _nonSubtypableDartCoreClassNames = {
   'int',
   'Null',
   'num',
+  'Record',
   'String',
 };
 

pkg/analyzer/test/src/diagnostics/extends_disallowed_class_test.dart

@@ -92,6 +92,14 @@ class A extends num {}
     ]);
   }
 
+  test_class_Record() async {
+    await assertErrorsInCode('''
+class A extends Record {}
+''', [
+      error(CompileTimeErrorCode.EXTENDS_DISALLOWED_CLASS, 16, 6),
+    ]);
+  }
+
   test_class_String() async {
     await assertErrorsInCode('''
 class A extends String {}

pkg/analyzer/test/src/diagnostics/implements_disallowed_class_test.dart

@@ -116,6 +116,14 @@ class A implements num {}
     ]);
   }
 
+  test_class_Record() async {
+    await assertErrorsInCode('''
+class A implements Record {}
+''', [
+      error(CompileTimeErrorCode.IMPLEMENTS_DISALLOWED_CLASS, 19, 6),
+    ]);
+  }
+
   test_class_String() async {
     await assertErrorsInCode('''
 class A implements String {}

pkg/analyzer/test/src/diagnostics/mixin_of_disallowed_class_test.dart

@@ -82,6 +82,14 @@ class A extends Object with num {}
     ]);
   }
 
+  test_class_Record() async {
+    await assertErrorsInCode('''
+class A extends Object with Record {}
+''', [
+      error(CompileTimeErrorCode.MIXIN_OF_DISALLOWED_CLASS, 28, 6),
+    ]);
+  }
+
   test_class_String() async {
     await assertErrorsInCode('''
 class A extends Object with String {}