Include 'enableGenericMethods' into salt.

pkg/analyzer/lib/src/dart/analysis/driver.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.
 
 import 'dart:async';
 import 'dart:collection';
 import 'dart:typed_data';
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/error/error.dart';
@@ skipping 613 matching lines @@
       return new _LibraryContext(libraryFile, libraryNode, store);
     });
   }
 
   /**
    * Fill [_salt] with data.
    */
   void _fillSalt() {
     int analysisOptionsSalt = 0;
     analysisOptionsSalt |= _analysisOptions.strongMode ? (1 << 0) : 0;
+    analysisOptionsSalt |= _analysisOptions.enableGenericMethods ? (1 << 1) : 0;

[Brian Wilkerson, 2016/11/08 21:15:08]

Have you looked at AnalysisOptionsImpl.encodeCrossContextOptions()? There are
several other options that affect analysis, and there's already an encoding for
them.

[scheglov, 2016/11/09 01:21:38]

Done.

     _salt[0] = DATA_VERSION;
     _salt[1] = analysisOptionsSalt;
   }
 
   /**
    * If we know the result [key] for the [file], try to load the analysis
    * result from the cache. Return `null` if not found.
    */
   AnalysisResult _getCachedAnalysisResult(FileState file, String key) {
     List<int> bytes = _byteStore.get(key);
@@ skipping 378 matching lines @@
   /**
    * Complete the [signal] future if it is not completed yet. It is safe to
    * call this method multiple times, but the [signal] will complete only once.
    */
   void notify() {
     if (!_completer.isCompleted) {
       _completer.complete(null);
     }
   }
 }