.
.
.
[   +2 ms] Running Gradle task 'bundleRelease'...
[   +7 ms] executing: [/Users/ezragunn/private-develop/projects/codecumbers/android/]
/Users/ezragunn/private-develop/projects/codecumbers/android/gradlew -Pverbose=true -Ptarget=lib/main.dart
-Ptrack-widget-creation=false -Pproguard=true -Ptarget-platform=android-arm,android-arm64 bundleRelease
[+2302 ms] FAILURE: Build failed with an exception.
[   +3 ms] * Where:
[        ] Script '/Users/ezragunn/private-develop/SDKs/flutter/packages/flutter_tools/gradle/flutter.gradle' line: 163
[        ] * What went wrong:
[        ] A problem occurred evaluating script.
[        ] > Failed to apply plugin [class 'FlutterPlugin']
[        ]    > No signature of method: static FlutterPlugin.useProguard() is applicable for argument types: (Boolean) values:
[true]
[        ] * Try:
[        ] Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run
with --scan to get full insights.
[        ] * Get more help at https://help.gradle.org
[        ] BUILD FAILED in 2s
[ +740 ms] Running Gradle task 'bundleRelease'... (completed in 3.1s)
[   +7 ms] "flutter appbundle" took 283,198ms.
Gradle task bundleRelease failed with exit code 1

#0      throwToolExit (package:flutter_tools/src/base/common.dart:28:3)
#1      _buildGradleProjectV2 (package:flutter_tools/src/android/gradle.dart:791:5)
<asynchronous suspension>
#2      buildGradleProject (package:flutter_tools/src/android/gradle.dart:519:14)
<asynchronous suspension>
#3      _AndroidBuilderImpl.buildAab (package:flutter_tools/src/android/android_builder.dart:136:12)
<asynchronous suspension>
#4      BuildAppBundleCommand.runCommand (package:flutter_tools/src/commands/build_appbundle.dart:75:26)
<asynchronous suspension>
#5      FlutterCommand.verifyThenRunCommand (package:flutter_tools/src/runner/flutter_command.dart:490:18)
#6      _asyncThenWrapperHelper.<anonymous closure> (dart:async-patch/async_patch.dart:71:64)
#7      _rootRunUnary (dart:async/zone.dart:1132:38)
#8      _CustomZone.runUnary (dart:async/zone.dart:1029:19)
#9      _FutureListener.handleValue (dart:async/future_impl.dart:137:18)
#10     Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:678:45)
#11     Future._propagateToListeners (dart:async/future_impl.dart:707:32)
#12     Future._completeWithValue (dart:async/future_impl.dart:522:5)
#13     Future._asyncComplete.<anonymous closure> (dart:async/future_impl.dart:552:7)
#14     _rootRun (dart:async/zone.dart:1124:13)
#15     _CustomZone.run (dart:async/zone.dart:1021:19)
#16     _CustomZone.runGuarded (dart:async/zone.dart:923:7)
#17     _CustomZone.bindCallbackGuarded.<anonymous closure> (dart:async/zone.dart:963:23)
#18     _microtaskLoop (dart:async/schedule_microtask.dart:41:21)
#19     _startMicrotaskLoop (dart:async/schedule_microtask.dart:50:5)
#20     _runPendingImmediateCallback (dart:isolate-patch/isolate_patch.dart:116:13)
#21     _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:173:5)

Ezras-MacBook-Pro:codecumbers ezragunn$ flutter doctor -v
[✓] Flutter (Channel master, v1.10.2-pre.31, on Mac OS X 10.14.6 18G95, locale en-GB)
    • Flutter version 1.10.2-pre.31 at /Users/ezragunn/private-develop/SDKs/flutter
    • Framework revision 1676b012e8 (2 hours ago), 2019-09-10 19:01:12 -0700
    • Engine revision 7ea9884ab0
    • Dart version 2.5.0 (build 2.5.0-dev.4.0 be66176534)

 
[✓] Android toolchain - develop for Android devices (Android SDK version 29.0.2)
    • Android SDK at /Users/ezragunn/Library/Android/sdk
    • Android NDK location not configured (optional; useful for native profiling support)
    • Platform android-29, build-tools 29.0.2
    • Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 1.8.0_202-release-1483-b49-5587405)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 10.3)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Xcode 10.3, Build version 10G8
    • CocoaPods version 1.7.1

[✓] Chrome - develop for the web
    • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] Android Studio (version 3.5)
    • Android Studio at /Applications/Android Studio.app/Contents
    • Flutter plugin version 39.0.3
    • Dart plugin version 191.8423
    • Java version OpenJDK Runtime Environment (build 1.8.0_202-release-1483-b49-5587405)

[✓] IntelliJ IDEA Community Edition (version 2019.2.2)
    • IntelliJ at /Applications/IntelliJ IDEA CE.app
    • Flutter plugin version 39.0.5
    • Dart plugin version 192.6603.23

[✓] Connected device (2 available)
    • iPhone Xʀ • 14576690-91D8-430C-A80E-A32CC3459002 • ios            • com.apple.CoreSimulator.SimRuntime.iOS-12-4
      (simulator)
    • Chrome    • chrome                               • web-javascript • Google Chrome 76.0.3809.132