Issue 27243. Don't attempt to read Windows device drivers.

pkg/analyzer/lib/file_system/physical_file_system.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 analyzer.file_system.physical_file_system;
 
 import 'dart:async';
 import 'dart:core' hide Resource;
 import 'dart:io' as io;
 
@@ skipping 134 matching lines @@
     return new FileSource(this, uri ?? pathContext.toUri(path));
   }
 
   @override
   bool isOrContains(String path) {
     return path == this.path;
   }
 
   @override
   List<int> readAsBytesSync() {
+    _throwIfWindowsDeviceDriver();
     try {
       return _file.readAsBytesSync();
     } on io.FileSystemException catch (exception) {
       throw new FileSystemException(exception.path, exception.message);
     }
   }
 
   @override
   String readAsStringSync() {
+    _throwIfWindowsDeviceDriver();
     try {
       return FileBasedSource.fileReadMode(_file.readAsStringSync());
     } on io.FileSystemException catch (exception) {
       throw new FileSystemException(exception.path, exception.message);
     }
   }
 
   @override
   File renameSync(String newPath) {
     try {
@@ skipping 170 matching lines @@
   void delete() {
     try {
       _entry.deleteSync(recursive: true);
     } on io.FileSystemException catch (exception) {
       throw new FileSystemException(exception.path, exception.message);
     }
   }
 
   @override
   String toString() => path;
+
+  /**
+   * If the operating system is Windows and the resource references one of the
+   * device drivers, throw a [FileSystemException].
+   *
+   * https://support.microsoft.com/en-us/kb/74496
+   */
+  void _throwIfWindowsDeviceDriver() {
+    if (io.Platform.isWindows) {
+      String shortName = this.shortName.toUpperCase();
+      if (shortName == r'CON' ||
+          shortName == r'PRN' ||
+          shortName == r'AUX' ||
+          shortName == r'CLOCK$' ||
+          shortName == r'NUL' ||
+          shortName == r'COM1' ||
+          shortName == r'LPT1' ||
+          shortName == r'LPT2' ||
+          shortName == r'LPT3' ||
+          shortName == r'COM2' ||
+          shortName == r'COM3' ||
+          shortName == r'COM4') {
+        throw new FileSystemException(
+            path, 'Windows device drivers cannot be read.');
+      }
+    }
+  }
 }
 
 /**
  * This class encapsulates logic for creating a single [IsolateRunner].
  */
 class _SingleIsolateRunnerProvider {
   bool _isSpawning = false;
   IsolateRunner _runner;
 
   /**
@@ skipping 11 matching lines @@
           timer.cancel();
         }
       });
       return completer.future;
     }
     _isSpawning = true;
     _runner = await IsolateRunner.spawn();
     return _runner;
   }
 }