"Access is allowed from event dispatch thread only" on project creation when used with the 'Install SDK' option

Please file this bug report at https://github.com/flutter/flutter-intellij/issues/new.

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What happened

(please describe what you were doing when this exception occurred)

Version information

IntelliJ IDEA 2019.2 EAP • Flutter plugin io.flutter 36.1.5 • Dart plugin 192.5281.24

Flutter 1.6.3 • channel beta • https://github.com/flutter/flutter.git Framework • revision bc7bc94083 (5 weeks ago) • 2019-05-23 10:29:07 -0700 Engine • revision 8dc3a4cde2 Tools • Dart 2.3.2 (build 2.3.2-dev.0.0 e3edfd36b2)

Exception

Access is allowed from event dispatch thread only.

com.intellij.openapi.diagnostic.RuntimeExceptionWithAttachments: EventQueue.isDispatchThread()=false Toolkit.getEventQueue()=com.intellij.ide.IdeEventQueue@48cda804
Current thread: Thread[flutter,4,Idea Thread Group] 231686009
SystemEventQueueThread: Thread[AWT-EventQueue-0 2019.2#IU-192.5281.24 IDEA, eap:true, os:Mac OS X 10.14.5, java-version:JetBrains s.r.o 11.0.3+12-b304.2 2019.2#IU-192.5281.24 IDEA, eap:true, os:Mac OS X 10.14.5, java-version:JetBrains s.r.o 11.0.3+12-b304.2,6,Idea Thread Group] 935227418
	at com.intellij.openapi.application.impl.ApplicationImpl.assertIsDispatchThread(ApplicationImpl.java:1070)
	at com.intellij.openapi.application.impl.ApplicationImpl.assertIsDispatchThread(ApplicationImpl.java:1059)
	at com.intellij.openapi.wm.impl.FocusManagerImpl.assertDispatchThread(FocusManagerImpl.java:433)
	at com.intellij.openapi.wm.impl.FocusManagerImpl.getFocusOwner(FocusManagerImpl.java:231)
	at com.intellij.openapi.wm.impl.IdeFocusManagerImpl.getFocusOwner(IdeFocusManagerImpl.java:102)
	at com.intellij.ui.messages.JBMacMessages.getForemostWindow(JBMacMessages.java:104)
	at com.intellij.ui.messages.JBMacMessages.showErrorDialog(JBMacMessages.java:187)
	at com.intellij.openapi.ui.Messages.showErrorDialog(Messages.java:799)
	at com.intellij.ide.util.newProjectWizard.AbstractProjectWizard.commitStepData(AbstractProjectWizard.java:236)
	at com.intellij.ide.util.newProjectWizard.AbstractProjectWizard.doNextAction(AbstractProjectWizard.java:250)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:566)
	at io.flutter.module.FlutterGeneratorPeer.requestNextStep(FlutterGeneratorPeer.java:225)
	at io.flutter.actions.InstallSdkAction$InstallAction.requestNextStep(InstallSdkAction.java:142)
	at io.flutter.actions.InstallSdkAction$GitCloneAction$FlutterPrecacheCommand.onSuccess(InstallSdkAction.java:399)
	at io.flutter.actions.InstallSdkAction$GitCloneAction$InstallCommand$1.processTerminated(InstallSdkAction.java:293)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:566)
	at com.intellij.execution.process.ProcessHandler$2.invoke(ProcessHandler.java:214)
	at com.sun.proxy.$Proxy20.processTerminated(Unknown Source)
	at com.intellij.execution.process.ProcessHandler.lambda$notifyTerminated$2(ProcessHandler.java:172)
	at com.intellij.execution.process.ProcessHandler$TasksRunner.execute(ProcessHandler.java:247)
	at com.intellij.execution.process.ProcessHandler.notifyTerminated(ProcessHandler.java:155)
	at com.intellij.execution.process.ProcessHandler.notifyProcessTerminated(ProcessHandler.java:151)
	at com.intellij.execution.process.BaseProcessHandler.onOSProcessTerminated(BaseProcessHandler.java:61)
	at com.intellij.execution.process.OSProcessHandler.onOSProcessTerminated(OSProcessHandler.java:168)
	at com.intellij.execution.process.BaseOSProcessHandler$1.lambda$startNotified$0(BaseOSProcessHandler.java:99)
	at com.intellij.execution.process.ProcessWaitFor.lambda$null$0(ProcessWaitFor.java:61)
	at com.intellij.util.ConcurrencyUtil.runUnderThreadName(ConcurrencyUtil.java:208)
	at com.intellij.execution.process.ProcessWaitFor.lambda$new$1(ProcessWaitFor.java:43)
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
	at java.base/java.lang.Thread.run(Thread.java:834)

[stevemessick]

As indicated, the problem occurs when the Install SDK button is used to download the Flutter SDK. The SDK is downloaded and the project is created correctly, but the error is shown when the project opens.

@pq probably has the best context here.

[stevemessick]

Thanks. We’ll try again with a fresh install. It is quite possible some API changes require an update to the code behind the Install SDK button.

@pq