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[tool_crash] when passing /? as positional argument to flutter create #70616

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#172328
Closed
[tool_crash] when passing /? as positional argument to flutter create#70616
#172328
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matanlurey
Labels
P3Issues that are less important to the Flutter projecta: qualityA truly polished experienceteam-toolOwned by Flutter Tool teamtoolAffects the "flutter" command-line tool. See also t: labels.tool-still-validIssues that have been deemed still valid as part of the Flutter Tools issue cleanup initiative.triaged-toolTriaged by Flutter Tool team

Description

@raminrahimzada
raminrahimzada
opened on Nov 16, 2020

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.

Activity

  1. jonahwilliams
    added
    toolAffects the "flutter" command-line tool. See also t: labels.
    P3Issues that are less important to the Flutter project
    a: qualityA truly polished experience
    on Nov 16, 2020
  2. jonahwilliams
    changed the title [-][tool_crash] FileSystemException: Exists failed, OS Error: The filename, directory name, or volume label syntax is incorrect., errno = 123[/-] [+][tool_crash] when passing /? as positional argument to flutter create[/+] on Nov 16, 2020
  3. pedromassangocode
    added
    passed first triage
    on Dec 1, 2020

  4. jonahwilliams commented on Feb 25, 2021

    @jonahwilliams
    jonahwilliams
    on Feb 25, 2021
    Contributor

    I actually added some work arounds to support -? as a help command, we could add support for /? easily enough. c.f.

    flutter/packages/flutter_tools/lib/executable.dart

    Line 68 in ce318b7

    final int powershellHelpIndex = args.indexOf('-?');

    PRs welcome!

  5. flutter-triage-bot
    added
    team-toolOwned by Flutter Tool team
    triaged-toolTriaged by Flutter Tool team
    on Jul 8, 2023
  6. Hixie
    removed
    passed first triage
    on Jul 8, 2023
  7. matanlurey
    self-assigned this
    on Jul 10, 2025
  8. matanlurey
    added
    tool-still-validIssues that have been deemed still valid as part of the Flutter Tools issue cleanup initiative.
    on Jul 10, 2025
  9. github-merge-queue
    added a commit that references this issue on Jul 21, 2025

    Add support for `/?` to alias to `--help` (#172328)

    80f4a0f
  10. auto-submit
    closed this as completedin #172328on Jul 21, 2025
  11. azatech
    added a commit that references this issue on Jul 28, 2025

    Add support for `/?` to alias to `--help` (flutter#172328)

    bd82f9f

  12. github-actions commented on Aug 4, 2025

    @github-actions
    github-actionsbot
    on Aug 4, 2025 – with GitHub Actions

    This thread has been automatically locked since there has not been any recent activity after it was closed. If you are still experiencing a similar issue, please open a new bug, including the output of flutter doctor -v and a minimal reproduction of the issue.

  13. github-actions
    locked as resolved and limited conversation to collaborators on Aug 4, 2025
  14. ksokolovskyi
    added a commit that references this issue on Aug 19, 2025

    Add support for `/?` to alias to `--help` (flutter#172328)

    c33ea3b
  15. mboetger
    added a commit that references this issue on Sep 18, 2025

    Add support for `/?` to alias to `--help` (flutter#172328)

    f6b2d21
  16. korca0220
    added a commit that references this issue on Sep 22, 2025

    Add support for `/?` to alias to `--help` (flutter#172328)

    e5aba73
  17. lucaantonelli
    added a commit that references this issue on Nov 21, 2025

    Add support for `/?` to alias to `--help` (flutter#172328)

    51e83da
  18. Nakiha
    added a commit that references this issue on Sep 28, 2026

    Add support for `/?` to alias to `--help` (#172328)

    e44487f
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P3Issues that are less important to the Flutter projecta: qualityA truly polished experienceteam-toolOwned by Flutter Tool teamtoolAffects the "flutter" command-line tool. See also t: labels.tool-still-validIssues that have been deemed still valid as part of the Flutter Tools issue cleanup initiative.triaged-toolTriaged by Flutter Tool team

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