DateTime.parse() should throw an exception when incorrect values are passed

[bizz84]

Steps to Reproduce

Initialising a DateTime object with incorrect YYYY | MM | DD should throw an exception.

Currently, I can type in:

print(DateTime.parse("1999-02-31"));

And get the following log:

flutter: 1999-03-03 00:00:00.000

This is a known issue and there is a TODO in date_time.dart:

  // TODO(lrn): restrict incorrect values like  2003-02-29T50:70:80.
  // Or not, that may be a breaking change.

This is annoying as it means that Flutter doesn't provide a way to reliably validate dates that have been entered manually by the user.

Logs

[✓] Flutter (Channel stable, v1.0.0, on Mac OS X 10.13.6 17G65, locale en-GB)
    • Flutter version 1.0.0 at /Users/andrea/Documents/flutter
    • Framework revision 5391447fae (8 weeks ago), 2018-11-29 19:41:26 -0800
    • Engine revision 7375a0f414
    • Dart version 2.1.0 (build 2.1.0-dev.9.4 f9ebf21297)

[✓] Android toolchain - develop for Android devices (Android SDK 28.0.3)
    • Android SDK at /Users/andrea/Library/Android/sdk
    • Android NDK location not configured (optional; useful for native profiling support)
    • Platform android-28, build-tools 28.0.3
    • Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1136-b06)
    • All Android licenses accepted.

[!] iOS toolchain - develop for iOS devices (Xcode 10.1)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Xcode 10.1, Build version 10B61
    ✗ Verify that all connected devices have been paired with this computer in Xcode.
      If all devices have been paired, libimobiledevice and ideviceinstaller may require updating.
      To update with Brew, run:
        brew update
        brew uninstall --ignore-dependencies libimobiledevice
        brew uninstall --ignore-dependencies usbmuxd
        brew install --HEAD usbmuxd
        brew unlink usbmuxd
        brew link usbmuxd
        brew install --HEAD libimobiledevice
        brew install ideviceinstaller
    • ios-deploy 1.9.2
    ✗ ios-deploy out of date (1.9.4 is required). To upgrade with Brew:
        brew upgrade ios-deploy
    • CocoaPods version 1.6.0.beta.2

[✓] Android Studio (version 3.2)
    • Android Studio at /Applications/Android Studio.app/Contents
    • Flutter plugin version 30.0.1
    • Dart plugin version 181.5656
    • Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1136-b06)

[✓] VS Code (version 1.27.2)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 2.19.0

[✓] Connected device (3 available)
    • Andrea iPhone 6 • d55e78eee17b7004891adf317eda2e03f756f81c • ios • iOS 12.1.2
    • iPhone 5s       • 2B7A7A09-F040-4D4E-8B48-E563C7944E09     • ios • iOS 12.1 (simulator)
    • iPhone XR       • 29AF675D-D8B2-41AC-A51F-DFE473A56040     • ios • iOS 12.1 (simulator)

! Doctor found issues in 1 category.

[zoechi]

Duplicate of dart-lang/sdk#11189

[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.