flutter drive fails on iOS if a device has not been specified

[mravn-google]

Steps to Reproduce

In a flutter_drive-enabled flutter project, run

$ flutter drive --local-engine ios_debug_unopt
Starting iOS Simulator, because did not find existing connected devices.

Oops; flutter has exited unexpectedly.
Sending crash report to Google.
Crash report sent (report ID: d14c7b7530000000)
Crash report written to /Users/mravn/github/flutter/dev/integration_tests/channels/flutter_02.log;
please let us know at https://github.com/flutter/flutter/issues.

But this works:

$ flutter drive --local-engine ios_debug_unopt -d c1bdd
Starting application: lib/main.dart
Uploading Runner.app package contents... DONE.
Installing '(null)'
 - CreatingStagingDirectory (5%)
 - ExtractingPackage (15%)
 - InspectingPackage (20%)
 - TakingInstallLock (20%)
 - PreflightingApplication (30%)
 - InstallingEmbeddedProfile (30%)
 - VerifyingApplication (40%)
 - CreatingContainer (50%)
 - InstallingApplication (60%)
 - PostflightingApplication (70%)
 - SandboxingApplication (80%)
 - GeneratingApplicationMap (90%)
Running pod install...                                1.3s
Running Xcode build...                                9.3s
libMobileGestalt MobileGestaltSupport.m:153: pid 403 (Runner) does not have sandbox access for frZQaeyWLUvLjeuEK43hmg and IS NOT appropriately entitled
libMobileGestalt MobileGestalt.c:550: no access to InverseDeviceID (see <rdar://problem/11744455>)
Diagnostic server listening on http://127.0.0.1:56013/
Diagnostic server listening on http://127.0.0.1:56013/
Observatory listening on http://127.0.0.1:56014/
Observatory listening on http://127.0.0.1:56014/
00:00 +0: channel suite (setUpAll)
[info ] FlutterDriver: Connecting to Flutter application at http://127.0.0.1:8102/
[trace] FlutterDriver: Looking for the isolate
[trace] FlutterDriver: Isolate is paused at start.
[trace] FlutterDriver: Attempting to resume isolate
[trace] FlutterDriver: Waiting for service extension
[info ] FlutterDriver: Connected to Flutter application.
00:02 +0: channel suite step through
00:08 +1: channel suite (tearDownAll)
00:08 +1: All tests passed!
Stopping application instance.
$

Logs

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

command

flutter drive --local-engine ios_debug_unopt

exception

NoSuchMethodError: NoSuchMethodError: The method '[]' was called on null.
Receiver: null
Tried calling:

#0      Object._noSuchMethod (dart:core-patch/object_patch.dart:43)
#1      Object.noSuchMethod (dart:core-patch/object_patch.dart:47)
#2      compareIphoneVersions (package:flutter_tools/src/ios/simulators.dart:787)
#3      SimControl._findSuitableDeviceType.<anonymous closure> (package:flutter_tools/src/ios/simulators.dart:127)
#4      Sort._insertionSort (dart:_internal/sort.dart:69)
#5      Sort._doSort (dart:_internal/sort.dart:58)
#6      Sort.sort (dart:_internal/sort.dart:33)
#7      Object&ListMixin.sort (dart:collection/list.dart:309)
#8      SimControl._findSuitableDeviceType (package:flutter_tools/src/ios/simulators.dart:127)
#9      SimControl._createTestDevice (package:flutter_tools/src/ios/simulators.dart:100)
#10     SimControl.boot (package:flutter_tools/src/ios/simulators.dart:63)
<asynchronous suspension>
#11     findTargetDevice (package:flutter_tools/src/commands/drive.dart:221)
<asynchronous suspension>
#12     DriveCommand.runCommand (package:flutter_tools/src/commands/drive.dart:92)
<asynchronous suspension>
#13     FlutterCommand.verifyThenRunCommand (package:flutter_tools/src/runner/flutter_command.dart:151)
<asynchronous suspension>
#14     DriveCommand.verifyThenRunCommand (package:flutter_tools/src/commands/drive.dart:83)
<asynchronous suspension>
#15     FlutterCommand.run (package:flutter_tools/src/runner/flutter_command.dart:121)
#16     CommandRunner.runCommand (package:args/command_runner.dart:194)
<asynchronous suspension>
#17     FlutterCommandRunner.runCommand (package:flutter_tools/src/runner/flutter_command_runner.dart:262)
<asynchronous suspension>
#18     CommandRunner.run.<anonymous closure> (package:args/command_runner.dart:109)
#19     Future.Future.sync (dart:async/future.dart:208)
#20     CommandRunner.run (package:args/command_runner.dart:109)
#21     FlutterCommandRunner.run (package:flutter_tools/src/runner/flutter_command_runner.dart:157)
#22     run.<anonymous closure> (package:flutter_tools/executable.dart:140)
<asynchronous suspension>
#23     AppContext._run (package:flutter_tools/src/base/context.dart:76)
<asynchronous suspension>
#24     AppContext.runInZone.<anonymous closure> (package:flutter_tools/src/base/context.dart:66)
#25     _rootRun (dart:async/zone.dart:1120)
#26     _CustomZone.run (dart:async/zone.dart:1001)
#27     runZoned (dart:async/zone.dart:1465)
#28     AppContext.runInZone (package:flutter_tools/src/base/context.dart:65)
#29     run (package:flutter_tools/executable.dart:113)
<asynchronous suspension>
#30     main (package:flutter_tools/executable.dart:66)
<asynchronous suspension>
#31     main (file:///Users/mravn/github/flutter/packages/flutter_tools/bin/flutter_tools.dart:8)
#32     _startIsolate.<anonymous closure> (dart:isolate-patch/isolate_patch.dart:263)
#33     _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:151)

Flutter Doctor

[✓] Flutter (on Mac OS X 10.12.4 16E195, channel master)
    • Flutter at /Users/mravn/github/flutter
    • Framework revision 3c7e176a99 (7 hours ago), 2017-04-25 16:08:55 +0200
    • Engine revision a5b64899c9
    • Tools Dart version 1.23.0-dev.11.11

[✓] Host Executable Compatibility
    • Downloaded executables execute on host

[✓] Android toolchain - develop for Android devices (Android SDK 25.0.2)
    • Android SDK at /Users/mravn/Library/Android/sdk
    • Platform android-25, build-tools 25.0.2
    • Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
    • Java version: OpenJDK Runtime Environment (build 1.8.0_112-release-b06)

[✓] iOS toolchain - develop for iOS devices (Xcode 8.3.2)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Xcode 8.3.2, Build version 8E2002
    • ios-deploy 1.9.1
    • CocoaPods version 1.2.1

[✓] Android Studio (version 2.3)
    • Android Studio at /Applications/Android Studio.app/Contents
    • Gradle version 3.2
    • Java version: OpenJDK Runtime Environment (build 1.8.0_112-release-b06)

[✓] IntelliJ IDEA Community Edition (version 2016.3.4)
    • Dart plugin version 163.13137
    • Flutter plugin version 12.0

[✓] WebStorm (version 2017.1.1)
    • Flutter plugin version 13.0

[✓] Connected devices
    • Mikkel's iPod touch • c1bddaa8c422f9125dcc14b53af91e62aa7036d1 • ios • iOS 10.3.1 (14E304)

[Hixie]

This seems like a crash that would affect everyone, so leaving in current milestone.
cc @yjbanov

[yjbanov]

flutter drive no longer attempts to automatically start the Simulator, so this should not happen any more. I just tried reproducing and got the expected behavior:

No devices connected:

$ flutter drive lib/driver.dart
No devices found.

iPhone connected:

$ flutter drive lib/driver.dart
Using device iPhone.

iPhone 6s Simulator launched:

$ flutter drive lib/driver.dart
Using device iPhone 6s.

iPhone and Moto g4 connected:

$ flutter drive lib/driver.dart
Found multiple connected devices:
  - Moto G 4
  - Pixel 2 XL
  - iPhone

Using device Moto G 4.

Closing

[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.