java.util.ConcurrentModificationException
   at java.util.HashMap$HashIterator.nextEntry(HashMap.java:926)
   at java.util.HashMap$EntryIterator.next(HashMap.java:966)
   at java.util.HashMap$EntryIterator.next(HashMap.java:964)
   at org.netbeans.modules.cnd.repository.storage.UnitDescriptorsDictionary.getUnitDescriptor(UnitDescriptorsDictionary.java:87)
   at org.netbeans.modules.cnd.repository.storage.Storage.getUnitName(Storage.java:588)
   at org.netbeans.modules.cnd.repository.storage.StorageManager.getUnitName(StorageManager.java:265)
   at org.netbeans.modules.cnd.repository.RepositoryImpl.getUnitName(RepositoryImpl.java:300)
   at org.netbeans.modules.cnd.repository.api.Repository.getUnitName(Repository.java:133)
   at org.netbeans.modules.cnd.apt.utils.APTSerializeUtils.getUnitNameSafe(APTSerializeUtils.java:104)
   at org.netbeans.modules.cnd.modelimpl.repository.KeyUtilities.getUnitNameSafe(KeyUtilities.java:179)
   at org.netbeans.modules.cnd.modelimpl.repository.ProjectNameBasedKey.getProjectName(ProjectNameBasedKey.java:139)
   at org.netbeans.modules.cnd.modelimpl.repository.FileKey.toString(FileKey.java:74)
   at org.netbeans.modules.cnd.modelimpl.uid.KeyBasedUID.toString(KeyBasedUID.java:85)
   at java.lang.String.valueOf(String.java:2854)
   at java.lang.StringBuilder.append(StringBuilder.java:128)
   at org.netbeans.modules.cnd.modelimpl.csm.core.FakeRegistrationWorker$FixRegistrationRunnable.run(FakeRegistrationWorker.java:143)
Caused: org.openide.util.RequestProcessor$SlowItem: task failed due to: java.util.ConcurrentModificationException
   at org.openide.util.RequestProcessor.post(RequestProcessor.java:419)
   at org.netbeans.modules.cnd.modelimpl.csm.core.FakeRegistrationWorker.fixFakeRegistration(FakeRegistrationWorker.java:99)
   at org.netbeans.modules.cnd.modelimpl.csm.core.ProjectBase.onParseFinishImpl(ProjectBase.java:3032)
   at org.netbeans.modules.cnd.modelimpl.csm.core.ProjectBase.onParseFinish(ProjectBase.java:3015)
   at org.netbeans.modules.cnd.modelimpl.csm.core.ParserQueue.handleLastProjectFile(ParserQueue.java:904)
   at org.netbeans.modules.cnd.modelimpl.csm.core.ParserQueue.onFileParsingFinished(ParserQueue.java:888)
   at org.netbeans.modules.cnd.modelimpl.csm.core.ParserThread._run(ParserThread.java:164)
   at org.netbeans.modules.cnd.modelimpl.csm.core.ParserThread.run(ParserThread.java:74)
   at org.netbeans.modules.cnd.modelimpl.csm.core.ParserThreadManager$Wrapper.run(ParserThreadManager.java:92)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1423)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2033)