java.lang.IllegalStateException: Attempt to modify PSI for non-committed Document!

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java.lang.IllegalStateException: Attempt to modify PSI for non-committed Document!
at com.intellij.psi.impl.PsiToDocumentSynchronizer.checkPsiModificationAllowed(PsiToDocumentSynchronizer.java:83)
at com.intellij.psi.impl.PsiToDocumentSynchronizer.beforeChildrenChange(PsiToDocumentSynchronizer.java:153)
at com.intellij.psi.impl.PsiManagerImpl.fireEvent(PsiManagerImpl.java:418)
at com.intellij.psi.impl.PsiManagerImpl.beforeChildrenChange(PsiManagerImpl.java:270)
at com.intellij.psi.SingleRootFileViewProvider.onContentReload(SingleRootFileViewProvider.java:224)
at org.intellij.plugins.ceylon.ide.ceylonCode.psi.CeylonLocalAnalyzerManager$8$1.$call$(CeylonLocalAnalyzerManager.ceylon:183)
at ceylon.interop.java.JavaRunnable.run(JavaRunnable.ceylon:7)
at org.intellij.plugins.ceylon.ide.ceylonCode.psi.CeylonLocalAnalyzerManager$8.$call$(CeylonLocalAnalyzerManager.ceylon:182)
at ceylon.interop.java.JavaRunnable.run(JavaRunnable.ceylon:7)
at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.runNextEvent(LaterInvocator.java:345)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:756)
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:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:726)
at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:857)
at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:658)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
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)

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