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This issue was reported manually by alexvsimon. It already has 1 duplicates Build: NetBeans IDE 8.0 Beta (Build 201401141042) VM: Java HotSpot(TM) 64-Bit Server VM, 24.51-b03, Java(TM) SE Runtime Environment, 1.7.0_51-b13 OS: Windows 7 User Comments: GUEST: do not know where get the problem, just open the source file then get this error. Stacktrace: java.lang.AssertionError: Wrong instance, should be LibProjectImpl: C:\JavaPlatformDevelopmentTools\Programs\Cygwin64\lib\gcc\x86_64-pc-cygwin\4.8.2\include\c++\x86_64-pc-cygwin org.netbeans.modules.cnd.modelimpl.csm.core.ProjectImpl @6356084:6356084 at org.netbeans.modules.cnd.modelimpl.csm.core.LibProjectImpl.createInstance(LibProjectImpl.java:97) at org.netbeans.modules.cnd.modelimpl.csm.core.LibraryManager$LibraryEntry.createUID(LibraryManager.java:623) at org.netbeans.modules.cnd.modelimpl.csm.core.LibraryManager$LibraryEntry.getLibrary(LibraryManager.java:613) at org.netbeans.modules.cnd.modelimpl.csm.core.LibraryManager$LibraryEntry.access$200(LibraryManager.java:588) at org.netbeans.modules.cnd.modelimpl.csm.core.LibraryManager.getLibraries(LibraryManager.java:135) at org.netbeans.modules.cnd.modelimpl.csm.core.ProjectBase.getLibraries(ProjectBase.java:2779)
Created attachment 144441 [details] stacktrace
Created attachment 144928 [details] stacktrace Nothing. Some command line tools running in the background.
Created attachment 145006 [details] stacktrace <Please provide a description of the problem or the steps to reproduce> I was running a C++ application
Created attachment 145007 [details] stacktrace <Please provide a description of the problem or the steps to reproduce>
Created attachment 145517 [details] stacktrace Opening a source file from a C++ project. My first time.
Created attachment 147350 [details] stacktrace opening a file.
Created attachment 147351 [details] stacktrace nothing.
This issue is a duplicate of the bug #242881. A difference in java mode. This bug is reproduced with -ea java option. The bug #242881 is reproduced with -da java option. *** This bug has been marked as a duplicate of bug 242881 ***