build crashes

flutter_06.log

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

## command

flutter build apk --flavor=dev -t lib/main-dev.dart -v

## exception

NoSuchMethodError: NoSuchMethodError: The method 'copySync' was called on null.
Receiver: null
Tried calling: copySync("/Users/nate.eisner/app/hc_app/build/app/outputs/apk/app.apk")

```
#0      Object.noSuchMethod (dart:core-patch/object_patch.dart:50:5)
#1      _buildGradleProjectV2 (package:flutter_tools/src/android/gradle.dart:519:20)
#2      _asyncThenWrapperHelper.<anonymous closure> (dart:async-patch/async_patch.dart:77:64)
#3      _rootRunUnary (dart:async/zone.dart:1132:38)
#4      _CustomZone.runUnary (dart:async/zone.dart:1029:19)
#5      _FutureListener.handleValue (dart:async/future_impl.dart:126:18)
#6      Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:639:45)
#7      Future._propagateToListeners (dart:async/future_impl.dart:668:32)
#8      Future._complete (dart:async/future_impl.dart:473:7)
#9      _SyncCompleter.complete (dart:async/future_impl.dart:51:12)
#10     _AsyncAwaitCompleter.complete (dart:async-patch/async_patch.dart:28:18)
#11     _completeOnAsyncReturn (dart:async-patch/async_patch.dart:294:13)
#12     runCommandAndStreamOutput (package:flutter_tools/src/base/process.dart)
#13     _asyncThenWrapperHelper.<anonymous closure> (dart:async-patch/async_patch.dart:77:64)
#14     _rootRunUnary (dart:async/zone.dart:1132:38)
#15     _CustomZone.runUnary (dart:async/zone.dart:1029:19)
#16     _FutureListener.handleValue (dart:async/future_impl.dart:126:18)
#17     Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:639:45)
#18     Future._propagateToListeners (dart:async/future_impl.dart:668:32)
#19     Future._completeWithValue (dart:async/future_impl.dart:483:5)
#20     Future._asyncComplete.<anonymous closure> (dart:async/future_impl.dart:513:7)
#21     _rootRun (dart:async/zone.dart:1124:13)
#22     _CustomZone.run (dart:async/zone.dart:1021:19)
#23     _CustomZone.runGuarded (dart:async/zone.dart:923:7)
#24     _CustomZone.bindCallbackGuarded.<anonymous closure> (dart:async/zone.dart:963:23)
#25     _microtaskLoop (dart:async/schedule_microtask.dart:41:21)
#26     _startMicrotaskLoop (dart:async/schedule_microtask.dart:50:5)
#27     _runPendingImmediateCallback (dart:isolate-patch/isolate_patch.dart:116:13)
#28     _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:173:5)
```

## flutter doctor

```
[✓] Flutter (Channel master, v1.7.5-pre.21, on Mac OS X 10.14.5 18F203, locale en-US)
    • Flutter version 1.7.5-pre.21 at /Users/nate.eisner/dev/flutter
    • Framework revision 217890685b (13 hours ago), 2019-06-18 00:07:55 -0400
    • Engine revision 20d3861ac8
    • Dart version 2.4.0

[✓] Android toolchain - develop for Android devices (Android SDK version 29.0.0)
    • Android SDK at /Users/nate.eisner/Library/Android/sdk
    • Android NDK location not configured (optional; useful for native profiling support)
    • Platform android-29, build-tools 29.0.0
    • ANDROID_HOME = /Users/nate.eisner/Library/Android/sdk
    • 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-1343-b01)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 10.2.1)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Xcode 10.2.1, Build version 10E1001
    • CocoaPods version 1.6.0

[✓] iOS tools - develop for iOS devices
    • ios-deploy 1.9.4

[✓] Android Studio
    • Android Studio at /Applications/Android Studio 3.6 Preview.app/Contents
    • Flutter plugin version 35.3.3
    • Dart plugin version 191.7221
    • Java version OpenJDK Runtime Environment (build 1.8.0_202-release-1483-b49-5587405)

[✓] Android Studio (version 3.4)
    • Android Studio at /Applications/Android Studio.app/Contents
    • Flutter plugin version 36.1.1
    • Dart plugin version 183.6270
    • Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1343-b01)

[✓] Android Studio
    • Android Studio at /Applications/Android Studio 3.5 Preview.app/Contents
    • Flutter plugin version 35.3.3
    • Dart plugin version 191.7221
    • Java version OpenJDK Runtime Environment (build 1.8.0_202-release-1483-b02)

[!] IntelliJ IDEA Ultimate Edition (version 2019.1.3)
    • IntelliJ at /Applications/IntelliJ IDEA.app
    ✗ Flutter plugin not installed; this adds Flutter specific functionality.
    ✗ Dart plugin not installed; this adds Dart specific functionality.
    • For information about installing plugins, see
      https://flutter.dev/intellij-setup/#installing-the-plugins

[✓] VS Code (version 1.35.1)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.1.0

[✓] Connected device (1 available)
    • Android SDK built for x86 • emulator-5554 • android-x86 • Android 9 (API 28) (emulator)

! Doctor found issues in 1 category.
```