Slow operations are prohibited on EDT - FlutterSdk.java:138

[jwren]

New Flutter Project > default settings > Open in new Window, if given option.

This was on AS Narwhal.

this sometimes appears when/after the Flutter SDK is automatically configured:

java.lang.Throwable: Slow operations are prohibited on EDT. See SlowOperations.assertSlowOperationsAreAllowed javadoc.
	at com.intellij.openapi.diagnostic.Logger.error(Logger.java:375)
	at com.intellij.util.SlowOperations.assertSlowOperationsAreAllowed(SlowOperations.java:113)
	at com.intellij.openapi.vfs.newvfs.persistent.FSRecordsImpl.update(FSRecordsImpl.java:756)
	at com.intellij.openapi.vfs.newvfs.persistent.PersistentFSImpl.findChildInfo(PersistentFSImpl.java:620)
	at com.intellij.openapi.vfs.newvfs.impl.VirtualDirectoryImpl.findInPersistence(VirtualDirectoryImpl.java:155)
	at com.intellij.openapi.vfs.newvfs.impl.VirtualDirectoryImpl.doFindChild(VirtualDirectoryImpl.java:138)
	at com.intellij.openapi.vfs.newvfs.impl.VirtualDirectoryImpl.findChild(VirtualDirectoryImpl.java:84)
	at com.intellij.openapi.vfs.newvfs.impl.VirtualDirectoryImpl.findChild(VirtualDirectoryImpl.java:570)
	at com.intellij.openapi.vfs.newvfs.impl.VirtualDirectoryImpl.findChild(VirtualDirectoryImpl.java:50)
	at com.intellij.openapi.vfs.newvfs.VfsImplUtil.findFileByPath(VfsImplUtil.java:56)
	at com.intellij.openapi.vfs.impl.local.LocalFileSystemBase.findFileByPath(LocalFileSystemBase.java:57)
	at io.flutter.sdk.FlutterSdk.forPath(FlutterSdk.java:138)
	at io.flutter.sdk.FlutterSdkUtil.addKnownSDKPathsToCombo(FlutterSdkUtil.java:108)
	at io.flutter.module.FlutterGeneratorPeer.init(FlutterGeneratorPeer.java:67)
	at io.flutter.module.FlutterGeneratorPeer.<init>(FlutterGeneratorPeer.java:62)
	at io.flutter.module.FlutterModuleBuilder$FlutterModuleWizardStep.<init>(FlutterModuleBuilder.java:384)
	at io.flutter.module.FlutterModuleBuilder.getCustomOptionsStep(FlutterModuleBuilder.java:326)
	at com.intellij.ide.projectWizard.ProjectTypeStep.showCustomOptions(ProjectTypeStep.java:505)
	at com.intellij.ide.projectWizard.ProjectTypeStep.projectTypeChanged(ProjectTypeStep.java:458)
	at com.intellij.ide.projectWizard.ProjectTypeStep.lambda$new$1(ProjectTypeStep.java:197)
	at com.intellij.ide.projectWizard.projectTypeStep.ProjectTypeList.whenProjectTemplateGroupSelected$lambda$2(ProjectTypeList.kt:108)
	at java.desktop/javax.swing.JList.fireSelectionValueChanged(Unknown Source)
	at java.desktop/javax.swing.JList$ListSelectionHandler.valueChanged(Unknown Source)
	at java.desktop/javax.swing.DefaultListSelectionModel.fireValueChanged(Unknown Source)
	at java.desktop/javax.swing.DefaultListSelectionModel.fireValueChanged(Unknown Source)
...