Use "Object" as the reified type of covariant override parameters.

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

Index: pkg/analyzer/lib/src/dart/element/member.dart
diff --git a/pkg/analyzer/lib/src/dart/element/member.dart b/pkg/analyzer/lib/src/dart/element/member.dart
index d27b8140b97126adcb27fe7be6d86041ed4e145a..dbcb1055dd32a2a56f0bf9b45a407ae58638c166 100644
--- a/pkg/analyzer/lib/src/dart/element/member.dart
+++ b/pkg/analyzer/lib/src/dart/element/member.dart
@@ -603,6 +603,9 @@ class MethodMember extends ExecutableMember implements MethodElement {
   MethodDeclaration computeNode() => baseElement.computeNode();
 
   @override
+  FunctionType getReifiedType(DartType objectType) => baseElement.getReifiedType(objectType);

[Leaf, 2017/01/18 01:51:45]

long line?

[Bob Nystrom, 2017/01/18 21:42:52]

Done.

+
+  @override
   String toString() {
     MethodElement baseElement = this.baseElement;
     List<ParameterElement> parameters = this.parameters;