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This issue was reported manually by lallafa. It already has 3 duplicates Build: NetBeans IDE 7.1.2 (Build 201204101705) VM: Java HotSpot(TM) 64-Bit Server VM, 23.1-b03, Java(TM) SE Runtime Environment, 1.7.0_05-b05 OS: Windows 7 User Comments: lallafa: debugging single maven test kaisuchomel: Start project in debug GUEST: Trying to debug maven project. After this exception : - Threads list in Debugging Panel is hidden; - I can't stop the debugger with the stop button (netbeans crash). Stacktrace: java.lang.IllegalArgumentException: Comparison method violates its general contract! at java.util.TimSort.mergeHi(TimSort.java:868) at java.util.TimSort.mergeAt(TimSort.java:485) at java.util.TimSort.mergeForceCollapse(TimSort.java:426) at java.util.TimSort.sort(TimSort.java:223) at java.util.TimSort.sort(TimSort.java:173) at java.util.Arrays.sort(Arrays.java:659)
Created attachment 121182 [details] stacktrace
*** This bug has been marked as a duplicate of bug 209483 ***
Created attachment 121444 [details] stacktrace
Created attachment 121490 [details] stacktrace
This bug already has 5 duplicates see http://statistics.netbeans.org/exceptions/detail.do?id=185377
Created attachment 121503 [details] stacktrace Apperently there seems to be a mixup with ant libraries. Our project uses ant as dependencies. But if I try to debug a test it will start with this exception and the following lines in the output: Have no file for C:\OtherPrograms\Java\jdk1.5.0_22\jre\lib\i18n.jar WARNING: multiple versions of ant detected in path for junit jar:file:/C:/Program%20Files%20(x86)/NetBeans%207.2%20Beta/java/ant/lib/ant.jar!/org/apache/tools/ant/Project.class and jar:file:/C:/Benutzer/Thomas/.m2/repository/ant/ant/1.6.5/ant-1.6.5.jar!/org/apache/tools/ant/Project.class