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Try Find Usages for ObjectSynchronizer::FastHashCode and results tab doesn't show project node. Probably this messages printed during Find Usages are related: SEVERE [org.netbeans.modules.refactoring.java.ui.tree.FolderTreeElement]: Cannot find SourceGroup for /home/vv159170/devarea/jdk/jdk_trunk/hotspot/src/share/vm/prims SEVERE [org.netbeans.modules.refactoring.java.ui.tree.FolderTreeElement]: Cannot find SourceGroup for /home/vv159170/devarea/jdk/jdk_trunk/hotspot/src/share/vm/prims SEVERE [org.netbeans.modules.refactoring.java.ui.tree.FolderTreeElement]: Cannot find SourceGroup for /home/vv159170/devarea/jdk/jdk_trunk/hotspot/src/share/vm/runtime SEVERE [org.netbeans.modules.refactoring.java.ui.tree.FolderTreeElement]: Cannot find SourceGroup for /home/vv159170/devarea/jdk/jdk_trunk/hotspot/src/share/vm/runtime
Steps to reproduce: - IDE in ergonomics mode. - open C/C++ project - Find Usage anything View is in both modes (Show Logical View and Show Physical View) grouped by project. - open java project - repeat FU View is in Show Logical View mode grouped by package from java word.
work around of the issue #243766: http://hg.netbeans.org/cnd-main/rev/64eb1a7245ff Put C/C++ factory before java factory
According to comment in the bug #243766#c2 this is right fix.