Stop unwanted sharing between filter closures.

pkg/analysis_server/test/context_manager_test.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 test.context.directory.manager;
 
 import 'dart:collection';
 
 import 'package:analysis_server/src/context_manager.dart';
 import 'package:analyzer/file_system/file_system.dart';
@@ skipping 144 matching lines @@
     expect(filters, isNotNull);
     expect(filters, hasLength(1));
     expect(
         filters.first(new AnalysisError(
             new TestSource(), 0, 1, HintCode.UNUSED_LOCAL_VARIABLE, [
           ['x']
         ])),
         isTrue);
   }
 
+  test_error_filter_analysis_option_multiple_filters() async {
+    // Create files.
+    newFile(
+        [projPath, AnalysisEngine.ANALYSIS_OPTIONS_FILE],
+        r'''
+analyzer:
+  errors:
+    invalid_assignment: ignore
+    unused_local_variable: ignore
+''');
+    // Setup context.
+    manager.setRoots(<String>[projPath], <String>[], <String, String>{});
+
+    // Verify filter setup.
+    List<ErrorFilter> filters =
+        callbacks.currentContext.getConfigurationData(CONFIGURED_ERROR_FILTERS);
+    expect(filters, isNotNull);
+    expect(filters, hasLength(2));
+
+    var unused_error = new AnalysisError(
+        new TestSource(), 0, 1, HintCode.UNUSED_LOCAL_VARIABLE, [
+      ['x']
+    ]);
+
+    var invalid_assignment_error =
+        new AnalysisError(new TestSource(), 0, 1, HintCode.INVALID_ASSIGNMENT, [
+      ['x'],
+      ['y']
+    ]);
+
+    expect(filters.any((filter) => filter(unused_error)), isTrue);
+    expect(filters.any((filter) => filter(invalid_assignment_error)), isTrue);
+  }
+
   test_error_filter_analysis_option_synonyms() async {
     // Create files.
     newFile(
         [projPath, AnalysisEngine.ANALYSIS_OPTIONS_FILE],
         r'''
 analyzer:
   errors:
     unused_local_variable: ignore
     ambiguous_import: false
 ''');
@@ skipping 1731 matching lines @@
 class TestUriResolver extends UriResolver {
   Map<Uri, Source> uriMap;
 
   TestUriResolver(this.uriMap);
 
   @override
   Source resolveAbsolute(Uri uri, [Uri actualUri]) {
     return uriMap[uri];
   }
 }