Issue 27374. Include all configuration sources into REFERENCED_SOURCES.

pkg/analyzer/lib/src/task/dart.dart

 // Copyright (c) 2015, 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.task.dart;
 
 import 'dart:collection';
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/token.dart';
@@ skipping 4069 matching lines @@
       sourceKind = SourceKind.UNKNOWN;
     } else if (hasPartOfDirective && !hasNonPartOfDirective) {
       sourceKind = SourceKind.PART;
     }
     //
     // Compute referenced names.
     //
     ReferencedNames referencedNames = new ReferencedNames(_source);
     new ReferencedNamesBuilder(referencedNames).build(unit);
     //
-    // Record outputs.
+    // Compute source lists.
     //
     List<Source> explicitlyImportedSources =
         explicitlyImportedSourceSet.toList();
     List<Source> exportedSources = exportedSourceSet.toList();
     List<Source> importedSources = importedSourceSet.toList();
     List<Source> includedSources = includedSourceSet.toList();
-    List<AnalysisError> parseErrors = getUniqueErrors(errorListener.errors);
     List<Source> unitSources = <Source>[_source]..addAll(includedSourceSet);
-    List<Source> referencedSources = (new Set<Source>()
-          ..addAll(importedSources)
-          ..addAll(exportedSources)
-          ..addAll(unitSources))
-        .toList();
     List<LibrarySpecificUnit> librarySpecificUnits =
         unitSources.map((s) => new LibrarySpecificUnit(_source, s)).toList();
+    //
+    // Compute referenced sources.
+    //
+    Set<Source> referencedSources = new Set<Source>();
+    referencedSources.add(coreLibrarySource);
+    referencedSources.addAll(unitSources);
+    for (Directive directive in unit.directives) {
+      if (directive is NamespaceDirective) {
+        referencedSources.add(directive.uriSource);
+        for (Configuration configuration in directive.configurations) {
+          referencedSources.add(configuration.uriSource);
+        }
+      }
+    }
+    referencedSources.removeWhere((source) => source == null);
+    //
+    // Record outputs.
+    //
+    List<AnalysisError> parseErrors = getUniqueErrors(errorListener.errors);
     outputs[EXPLICITLY_IMPORTED_LIBRARIES] = explicitlyImportedSources;
     outputs[EXPORTED_LIBRARIES] = exportedSources;
     outputs[IMPORTED_LIBRARIES] = importedSources;
     outputs[INCLUDED_PARTS] = includedSources;
     outputs[LIBRARY_SPECIFIC_UNITS] = librarySpecificUnits;
     outputs[PARSE_ERRORS] = parseErrors;
     outputs[PARSED_UNIT] = unit;
     outputs[REFERENCED_NAMES] = referencedNames;
-    outputs[REFERENCED_SOURCES] = referencedSources;
+    outputs[REFERENCED_SOURCES] = referencedSources.toList();
     outputs[SOURCE_KIND] = sourceKind;
     outputs[UNITS] = unitSources;
   }
 
   /**
    * Return the result of resolving the URI of the given URI-based [directive]
    * against the URI of the given library, or `null` if the URI is not valid.
    */
   Source _resolveDirective(UriBasedDirective directive) {
     bool isImport = directive is ImportDirective;
@@ skipping 2303 matching lines @@
 
   @override
   bool moveNext() {
     if (_newSources.isEmpty) {
       return false;
     }
     currentTarget = _newSources.removeLast();
     return true;
   }
 }