Handle invalid URIs in summaries.

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/standard_resolution_map.dart';
@@ skipping 4240 matching lines @@
 
   /**
    * Return the result of resolve the given [uriContent], reporting errors
    * against the [uriLiteral].
    */
   Source _resolveUri(
       bool isImport, StringLiteral uriLiteral, String uriContent) {
     UriValidationCode code =
         UriBasedDirectiveImpl.validateUri(isImport, uriLiteral, uriContent);
     if (code == null) {
-      String encodedUriContent = Uri.encodeFull(uriContent);
-      return context.sourceFactory.resolveUri(_source, encodedUriContent);
+      try {
+        Uri.parse(uriContent);
+      } on FormatException {
+        return null;
+      }
+      return context.sourceFactory.resolveUri(_source, uriContent);
     } else if (code == UriValidationCode.URI_WITH_DART_EXT_SCHEME) {
       return null;
     } else if (code == UriValidationCode.URI_WITH_INTERPOLATION) {
       _errorReporter.reportErrorForNode(
           CompileTimeErrorCode.URI_WITH_INTERPOLATION, uriLiteral);
       return null;
     } else if (code == UriValidationCode.INVALID_URI) {
       _errorReporter.reportErrorForNode(
           CompileTimeErrorCode.INVALID_URI, uriLiteral, [uriContent]);
       return null;
@@ skipping 2278 matching lines @@
 
   @override
   bool moveNext() {
     if (_newSources.isEmpty) {
       return false;
     }
     currentTarget = _newSources.removeLast();
     return true;
   }
 }