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This issue was reported manually by dathyrius. It already has 2 duplicates Build: NetBeans IDE 8.0.1 (Build 201408251540) 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: GUEST: While opening Free-From-Project-Properites. dathyrius: Added a Source-Folder to my free form project an tried to configure the source class path Stacktrace: java.lang.IndexOutOfBoundsException: Index: 22, Size: 22 at java.util.ArrayList.RangeCheck(ArrayList.java:653) at java.util.ArrayList.get(ArrayList.java:429) at org.netbeans.modules.java.freeform.ui.ProjectModel.getSourceFolder(ProjectModel.java:381) at org.netbeans.modules.java.freeform.ui.ProjectModel.isTestSourceFolder(ProjectModel.java:718) at org.netbeans.modules.java.freeform.ui.ClasspathPanel.saveClasspath(ClasspathPanel.java:583) at org.netbeans.modules.java.freeform.ui.ClasspathPanel.sourceFolderItemStateChanged(ClasspathPanel.java:562)
Created attachment 151476 [details] stacktrace
This old bug may not be relevant anymore. If you can still reproduce it in 8.2 development builds please reopen this issue. Thanks for your cooperation, NetBeans IDE 8.2 Release Boss