Fixes #27752

pkg/dev_compiler/lib/src/compiler/command.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:io';
 import 'package:analyzer/src/generated/source.dart' show Source;
 import 'package:analyzer/src/summary/package_bundle_reader.dart'
     show InSummarySource;
 import 'package:args/args.dart' show ArgParser, ArgResults;
 import 'package:args/command_runner.dart' show UsageException;
@@ skipping 73 matching lines @@
 bool _changed(List<int> list1, List<int> list2) {
   var length = list1.length;
   if (length != list2.length) return true;
   for (var i = 0; i < length; ++i) {
     if (list1[i] != list2[i]) return true;
   }
   return false;
 }
 
 void _compile(ArgResults argResults, void printFn(Object obj)) {
-  var compiler =
-      new ModuleCompiler(new AnalyzerOptions.fromArguments(argResults));
-  var compilerOpts = new CompilerOptions.fromArguments(argResults);
   if (argResults['help']) {
     printFn(_usageMessage);
     return;
   }
+  var compiler =
+      new ModuleCompiler(new AnalyzerOptions.fromArguments(argResults));
+  var compilerOpts = new CompilerOptions.fromArguments(argResults);
   var outPaths = argResults['out'] as List<String>;
   var moduleFormats = parseModuleFormatOption(argResults);
   bool singleOutFile = argResults['single-out-file'];
   if (singleOutFile) {
     for (var format in moduleFormats) {
       if (format != ModuleFormat.amd && format != ModuleFormat.legacy) {
         _usageException('Format $format cannot be combined with '
             'single-out-file. Only amd and legacy modes are supported.');
       }
     }
@@ skipping 92 matching lines @@
     '\n\n${_argParser.usage}';
 
 void _usageException(String message) {
   throw new UsageException(message, _usageMessage);
 }
 
 /// Thrown when the input source code has errors.
 class CompileErrorException implements Exception {
   toString() => '\nPlease fix all errors before compiling (warnings are okay).';
 }