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This bug was originally marked as duplicate of bug 225033, that is already resolved. This bug is still valid, so this seems to be another bug, but it might be related. Build: NetBeans IDE Dev (Build 201504070001) VM: Java HotSpot(TM) 64-Bit Server VM, 25.25-b02, Java(TM) SE Runtime Environment, 1.8.0_25-b18 OS: Windows 7 User Comments: IrianR: Debugging. Stacktrace: java.util.ConcurrentModificationException: Current owner: [java.io.WinNTFileSystem.list(Native Method), java.io.File.list(File.java:1122), java.io.File.listFiles(File.java:1207), org.netbeans.modules.java.source.parsing.FolderArchive.getFiles(FolderArchive.java:144), org.netbeans.modules.java.source.parsing.CachingFileManager.list(CachingFileManager.java:130), org.netbeans.modules.java.source.parsing.ProxyFileManager.list(ProxyFileManager.java:189), com.sun.tools.javac.jvm.ClassReader.fillIn(ClassReader.java:2872), com.sun.tools.javac.jvm.ClassReader.complete(ClassReader.java:2492), com.sun.tools.javac.jvm.ClassReader.access$000(ClassReader.java:77), com.sun.tools.javac.jvm.ClassReader$1.complete(ClassReader.java:244), com.sun.tools.javac.code.Symbol.complete(Symbol.java:577), com.sun.tools.javac.jvm.ClassReader.completeOwners(ClassReader.java:2504), com.sun.tools.javac.jvm.ClassReader.complete(ClassReader.java:2475), com.sun.tools.javac.jvm.ClassReader.access$000(ClassReader.java:77), com.sun.tools.javac.jvm at org.netbeans.modules.java.source.parsing.ProxyFileManager.checkSingleOwnerThread(ProxyFileManager.java:540) at org.netbeans.modules.java.source.parsing.ProxyFileManager.list(ProxyFileManager.java:184) at com.sun.tools.javac.jvm.ClassReader.fillIn(ClassReader.java:2819) at com.sun.tools.javac.jvm.ClassReader.complete(ClassReader.java:2492) at com.sun.tools.javac.jvm.ClassReader.access$000(ClassReader.java:77) at com.sun.tools.javac.jvm.ClassReader$1.complete(ClassReader.java:244)
Created attachment 153841 [details] stacktrace