Created attachment 133286 [details]
FINE level logs

Ever since I accidentally started two NetBeans instances concurrently NetBeans reports this exception after startup:

java.lang.ArrayIndexOutOfBoundsException
	at java.lang.System.arraycopy(Native Method)
	at java.io.PushbackInputStream.unread(PushbackInputStream.java:235)
	at org.netbeans.modules.uihandler.Installer.copyWithEncoding(Installer.java:1458)
	at org.netbeans.modules.uihandler.Installer$Submit.doShow(Installer.java:1634)
	at org.netbeans.modules.uihandler.Installer.displaySummary(Installer.java:1001)
	at org.netbeans.modules.uihandler.Installer.access$400(Installer.java:114)
	at org.netbeans.modules.uihandler.Installer$2Auto.run(Installer.java:576)
	at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1432)
[catch] at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2044)


Additional notes:
- I have attached FINE level logs (kept only the logs around the exceptions and removed some logs being output too many times (the same log message was written a lot of times).
- When concurrently starting NetBeans it did actually install my plugin (Gradle Support).
- I believe that it is a NetBeans bug (and not my plugin's) because starting the plugin from the IDE does not cause this error. Also, it occurs even if no Gradle project is being opened on startup.
- Removing the user directory did not help (I did not try complete reinstall of NB).
- NetBeans seems to work fine after reporting this issue and never reports it again.