java.lang.NullPointerException

[GC-666]

Please describe what you did before the error occurred.
IMPORTANT! If the error occurs with a specific APK file please attach or provide link to apk file!

• Jadx version: 1.4.1
• Java version: 1.8.0_333
• Java VM: Oracle Corporation Java HotSpot(TM) 64-Bit Server VM
• Platform: Windows 10 (10.0 amd64)
• Max heap size: 11424 MB
• Program args: -Xms128M -XX:MaxRAMPercentage=70.0 -XX:+UseG1GC -Dawt.useSystemAAFontSettings=lcd -Dswing.aatext=true

java.lang.NullPointerException
	at jadx.gui.JadxWrapper.getClasses(JadxWrapper.java:105)
	at jadx.gui.ui.MainWindow.checkLoadedStatus(MainWindow.java:444)
	at jadx.gui.ui.MainWindow.lambda$loadFiles$0(MainWindow.java:422)
	at jadx.gui.jobs.SimpleTask.onFinish(SimpleTask.java:39)
	at jadx.gui.jobs.BackgroundExecutor$TaskWorker.done(BackgroundExecutor.java:257)
	at javax.swing.SwingWorker$5.run(SwingWorker.java:737)
	at javax.swing.SwingWorker$DoSubmitAccumulativeRunnable.run(SwingWorker.java:832)
	at sun.swing.AccumulativeRunnable.run(AccumulativeRunnable.java:112)
	at javax.swing.SwingWorker$DoSubmitAccumulativeRunnable.actionPerformed(SwingWorker.java:842)
	at javax.swing.Timer.fireActionPerformed(Timer.java:313)
	at javax.swing.Timer$DoPostEvent.run(Timer.java:245)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
	at java.awt.EventQueue.access$500(EventQueue.java:97)
	at java.awt.EventQueue$3.run(EventQueue.java:709)
	at java.awt.EventQueue$3.run(EventQueue.java:703)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:205)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)

[skylot]

Looks like this is a multithreaded issue: field decompiler updated in other thread, but not yet updated in this thread.
I commit a fix with volatile flag for that field and also with additional synchronization on field update.
Hope it will resolve this issue 🙂