Issue 1:
Flutter crash report; please file at https://github.com/flutter/flutter/issues.

command

flutter doctor

exception

ArgumentError: Invalid argument(s): Invalid locale 'C.UTF-8'

#0 Intl._throwLocaleError (package:intl/intl.dart:231)
#1 Intl.verifiedLocale (package:intl/intl.dart:225)
#2 Intl.verifiedLocale (package:intl/intl.dart:210)
#3 new NumberFormat._forPattern (package:intl/src/intl/number_format.dart:486)
#4 new NumberFormat.decimalPattern (package:intl/src/intl/number_format.dart:175)
#5 kMillisecondsFormat (package:flutter_tools/src/base/utils.dart:114)
#6 kMillisecondsFormat (package:flutter_tools/src/base/utils.dart:114)
#7 getElapsedAsMilliseconds (package:flutter_tools/src/base/utils.dart:122)
#8 FlutterCommand.run (package:flutter_tools/src/runner/flutter_command.dart:234)
<asynchronous suspension>
#9 CommandRunner.runCommand (package:args/command_runner.dart:194)
<asynchronous suspension>
#10 FlutterCommandRunner.runCommand (package:flutter_tools/src/runner/flutter_command_runner.dart:286)
<asynchronous suspension>
#11 CommandRunner.run.<anonymous closure> (package:args/command_runner.dart:109)
#12 new Future.sync (dart:async/future.dart:222)
#13 CommandRunner.run (package:args/command_runner.dart:109)
#14 FlutterCommandRunner.run (package:flutter_tools/src/runner/flutter_command_runner.dart:166)
#15 run.<anonymous closure> (package:flutter_tools/runner.dart:90)
<asynchronous suspension>
#16 AppContext._run (package:flutter_tools/src/base/context.dart:76)
<asynchronous suspension>
#17 AppContext.runInZone.<anonymous closure> (package:flutter_tools/src/base/context.dart:66)
#18 _rootRun (dart:async/zone.dart:1126)
#19 _CustomZone.run (dart:async/zone.dart:1023)
#20 runZoned (dart:async/zone.dart:1501)
#21 AppContext.runInZone (package:flutter_tools/src/base/context.dart:65)
#22 run (package:flutter_tools/runner.dart:61)
<asynchronous suspension>
#23 main (package:flutter_tools/executable.dart:48)
<asynchronous suspension>
#24 main (file:///home/dracula/Desktop/flutter/packages/flutter_tools/bin/flutter_tools.dart:16)
#25 _startIsolate.<anonymous closure> (dart:isolate-patch/dart:isolate/isolate_patch.dart:277)
#26 _RawReceivePortImpl._handleMessage (dart:isolate-patch/dart:isolate/isolate_patch.dart:165)

flutter doctor

[!] Flutter (Channel beta, v0.2.3, on Linux, locale C.UTF-8)
• Flutter version 0.2.3 at /home/dracula/Desktop/flutter
• Framework revision 5a58b36e36 (2 weeks ago), 2018-03-13 13:20:13 -0700
• Engine revision e61bb9ac3a
• Dart version 2.0.0-dev.35.flutter-290c576264
✗ Downloaded executables cannot execute on host.
See https://github.com/flutter/flutter/issues/6207 for more information
On Debian/Ubuntu/Mint: sudo apt-get install lib32stdc++6
On Fedora: dnf install libstdc++.i686
On Arch: pacman -S lib32-libstdc++5

[✗] Android toolchain - develop for Android devices
✗ Unable to locate Android SDK.
Install Android Studio from: https://developer.android.com/studio/index.html
On first launch it will assist you in installing the Android SDK components.
(or visit https://flutter.io/setup/#android-setup for detailed instructions).
If Android SDK has been installed to a custom location, set $ANDROID_HOME to that location.

[✗] Android Studio (not installed)
• Android Studio not found; download from https://developer.android.com/studio/index.html
(or visit https://flutter.io/setup/#android-setup for detailed instructions).

[✓] IntelliJ IDEA Ultimate Edition (version 2018.1)
• IntelliJ at /media/dracula/msk/SOFTWARES/programming lang/idea-IU-181.4203.550
• Flutter plugin version 23.1.3
• Dart plugin version 181.4203.498

! Doctor found issues in 3 categories.

Issue 2:
https://giphy.com/gifs/mXFpFPmmNIe38jrAJK

Velocity becomes 0 as soon as I lift the finger after a fling.