Fix order of output of references with invokeMethodRef.

pkg/analyzer/lib/src/summary/summarize_const_expr.dart

 // Copyright (c) 2016, 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 serialization.summarize_const_expr;
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/token.dart';
 import 'package:analyzer/dart/element/type.dart' show DartType;
 import 'package:analyzer/src/summary/format.dart';
@@ skipping 449 matching lines @@
   void _serializeMethodInvocation(MethodInvocation invocation) {
     if (invocation.target != null ||
         invocation.methodName.name != 'identical') {
       isValidConst = false;
     }
     Expression target = invocation.target;
     SimpleIdentifier methodName = invocation.methodName;
     ArgumentList argumentList = invocation.argumentList;
     if (_isIdentifierSequence(methodName)) {
       EntityRefBuilder ref = serializeIdentifierSequence(methodName);
+      _serializeArguments(argumentList);
       references.add(ref);
-      _serializeArguments(argumentList);
       operations.add(UnlinkedConstOperation.invokeMethodRef);
     } else {
       if (!invocation.isCascaded) {
         _serialize(target);
       }
       _serializeArguments(argumentList);
       strings.add(methodName.name);
       operations.add(UnlinkedConstOperation.invokeMethod);
     }
   }
@@ skipping 100 matching lines @@
         expr = (expr as PrefixedIdentifier).prefix;
       } else if (expr is PropertyAccess) {
         expr = (expr as PropertyAccess).target;
       } else {
         return false;
       }
     }
     return false;
   }
 }