[tool_crash] when passing /? as positional argument to flutter create #70616
Description
Command
I think this is not a big issue
flutter create /?
Steps to Reproduce
As usually i do with other cli apps , gave flutter create /? command to see the parameters of new project creation and then , i think flutter accepted /? as project name and tried to create files/folders with that name, so this crash occured. Would be great if you fix it,
thanks
Logs
FileSystemException: Exists failed, OS Error: The filename, directory name, or volume label syntax is incorrect.
, errno = 123
#0 _Directory.existsSync (dart:io/directory_impl.dart:94:7)
#1 ForwardingFileSystemEntity.existsSync (package:file/src/forwarding/forwarding_file_system_entity.dart:45:33)
#2 ForwardingFileSystemEntity.existsSync (package:file/src/forwarding/forwarding_file_system_entity.dart:45:33)
#3 CreateCommand._getProjectType (package:flutter_tools/src/commands/create.dart:260:22)
#4 CreateCommand.runCommand (package:flutter_tools/src/commands/create.dart:359:41)
#5 FlutterCommand.verifyThenRunCommand (package:flutter_tools/src/runner/flutter_command.dart:860:18)
#6 _rootRunUnary (dart:async/zone.dart:1198:47)
#7 _CustomZone.runUnary (dart:async/zone.dart:1100:19)
#8 _FutureListener.handleValue (dart:async/future_impl.dart:143:18)
#9 Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:696:45)
#10 Future._propagateToListeners (dart:async/future_impl.dart:725:32)
#11 Future._completeWithValue (dart:async/future_impl.dart:529:5)
#12 Future._asyncCompleteWithValue.<anonymous closure> (dart:async/future_impl.dart:567:7)
#13 _rootRun (dart:async/zone.dart:1190:13)
#14 _CustomZone.run (dart:async/zone.dart:1093:19)
#15 _CustomZone.runGuarded (dart:async/zone.dart:997:7)
#16 _CustomZone.bindCallbackGuarded.<anonymous closure> (dart:async/zone.dart:1037:23)
#17 _microtaskLoop (dart:async/schedule_microtask.dart:41:21)
#18 _startMicrotaskLoop (dart:async/schedule_microtask.dart:50:5)
#19 _runPendingImmediateCallback (dart:isolate-patch/isolate_patch.dart:118:13)
#20 _Timer._runTimers (dart:isolate-patch/timer_impl.dart:404:11)
#21 _Timer._handleMessage (dart:isolate-patch/timer_impl.dart:428:5)
#22 _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:168:12)
[✓] Flutter (Channel stable, 1.20.4, on Microsoft Windows [Version 10.0.19041.630], locale en-US)
• Flutter version 1.20.4 at D:\FLUTTER\flutter
• Framework revision fba99f6cf9 (9 weeks ago), 2020-09-14 15:32:52 -0700
• Engine revision d1bc06f032
• Dart version 2.9.2
[✓] Android toolchain - develop for Android devices (Android SDK version 29.0.2)
• Android SDK at D:\ANDROID_SDK
• Platform android-29, build-tools 29.0.2
• ANDROID_SDK_ROOT = D:\ANDROID_SDK
• Java binary at: C:\Program Files\Android\Android Studio\jre\bin\java
• Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b01)
• All Android licenses accepted.
[!] Android Studio
• Android Studio at C:\Program Files\Android\Android Studio
✗ Flutter plugin not installed; this adds Flutter specific functionality.
✗ Dart plugin not installed; this adds Dart specific functionality.
• android-studio-dir = C:\Program Files\Android\Android Studio
• Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b01)
[!] Connected device
! No devices available
! Doctor found issues in 2 categories.
Flutter Application Metadata
No pubspec in working directory.