fixes #26993, constant evaluation gets wrong type

pkg/analyzer/lib/src/generated/static_type_analyzer.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library analyzer.src.generated.static_type_analyzer;
 
 import 'dart:collection';
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/token.dart';
@@ skipping 1993 matching lines @@
 
     ArgumentList arguments = node.argumentList;
     FunctionType inferred = _inferGenericInvoke(
         node, constructorType, constructor.type.typeArguments, arguments);
 
     if (inferred != null && inferred != originalElement.type) {
       // Fix up the parameter elements based on inferred method.
       arguments.correspondingStaticParameters = ResolverVisitor
           .resolveArgumentsToParameters(arguments, inferred.parameters, null);
       inferConstructorName(constructor, inferred.returnType);
-      // TODO(jmesserly): should we fix up the staticElement as well?
+      // Update the static element as well. This is used in some cases, such as
+      // computing constant values. It is stored in two places.
+      constructor.staticElement =
+          ConstructorMember.from(rawElement, inferred.returnType);
+      node.staticElement = constructor.staticElement;
     }
   }
 
   /**
    * Given a local variable declaration and its initializer, attempt to infer
    * a type for the local variable declaration based on the initializer.
    * Inference is only done if an explicit type is not present, and if
    * inferring a type improves the type.
    */
   void _inferLocalVariableType(
@@ skipping 313 matching lines @@
     }
     // merge types
     if (result == null) {
       result = type;
     } else {
       result = _typeSystem.getLeastUpperBound(_typeProvider, result, type);
     }
     return null;
   }
 }