java.util.ConcurrentModificationException: This exception has no message.

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Solutions on the web

via Stack Overflow by XLordalX
, 2 years ago
via jetbrains.com by Unknown author, 1 year ago
This exception has no message.
via https://bugzilla.redhat.com/bugzilla/ by Ondrej Chaloupka, 1 year ago
via https://bugzilla.redhat.com/bugzilla/ by Ondrej Chaloupka, 1 year ago
via Stack Overflow by NaN
, 2 years ago
java.util.ConcurrentModificationException:
at java.util.HashMap$HashIterator.nextEntry(HashMap.java:787)
at com.google.appinventor.components.runtime.EventDispatcher.delegateDispatchEvent(EventDispatcher.java:219)
at com.google.appinventor.components.runtime.EventDispatcher.dispatchEvent(EventDispatcher.java:198)
at com.google.appinventor.components.runtime.Button.Click(Button.java:51)
at com.google.appinventor.components.runtime.Button.click(Button.java:43)
at com.google.appinventor.components.runtime.ButtonBase.onClick(ButtonBase.java:656)
at android.view.View.performClick(View.java:4780)
at android.view.View$PerformClick.run(View.java:19866)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)

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