Handle resolvedAst for forwarding constructors and callType on unnamed mixin applications.

pkg/compiler/lib/src/diagnostics/diagnostic_listener.dart

Index: pkg/compiler/lib/src/diagnostics/diagnostic_listener.dart
diff --git a/pkg/compiler/lib/src/diagnostics/diagnostic_listener.dart b/pkg/compiler/lib/src/diagnostics/diagnostic_listener.dart
index e31edde9fff1f47a915207d4126da47c35ea7a69..0a9c5f5353a1f34a05e7f6e8a0df446dbb3a1a01 100644
--- a/pkg/compiler/lib/src/diagnostics/diagnostic_listener.dart
+++ b/pkg/compiler/lib/src/diagnostics/diagnostic_listener.dart
@@ -61,6 +61,9 @@ abstract class DiagnosticReporter {
   DiagnosticMessage createMessage(Spannable spannable, MessageKind messageKind,
       [Map arguments = const {}]);
 
+  /// Returns `true` if a crash, an error or a fatal warning has been reported.
+  bool get hasReportedError;
+
   /// Called when an [exception] is thrown from user-provided code, like from
   /// the input provider or diagnostics handler.
   void onCrashInUserCode(String message, exception, stackTrace) {}