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Build ID: I20090129-1800 This NPE happens reproducible when hovering on a certain element in our code. Unfortunately, I was not able to come up with a simple test case to reproduce. However, you are more than welcome to drop by in my office and debug it on my machine. java.lang.NullPointerException at org.eclipse.jdt.internal.core.hierarchy.HierarchyResolver.setFocusType(HierarchyResolver.java:829) at org.eclipse.jdt.internal.core.hierarchy.HierarchyResolver.reportHierarchy(HierarchyResolver.java:493) at org.eclipse.jdt.internal.core.hierarchy.HierarchyResolver.resolve(HierarchyResolver.java:791) at org.eclipse.jdt.internal.core.hierarchy.HierarchyResolver.resolve(HierarchyResolver.java:584) at org.eclipse.jdt.internal.core.hierarchy.HierarchyBuilder.buildSupertypes(HierarchyBuilder.java:115) at org.eclipse.jdt.internal.core.hierarchy.IndexBasedHierarchyBuilder.build(IndexBasedHierarchyBuilder.java:135) at org.eclipse.jdt.internal.core.hierarchy.TypeHierarchy.compute(TypeHierarchy.java:300) at org.eclipse.jdt.internal.core.hierarchy.TypeHierarchy.refresh(TypeHierarchy.java:1255) at org.eclipse.jdt.internal.core.CreateTypeHierarchyOperation.executeOperation(CreateTypeHierarchyOperation.java:90) at org.eclipse.jdt.internal.core.JavaModelOperation.run(JavaModelOperation.java:721) at org.eclipse.jdt.internal.core.JavaModelOperation.runOperation(JavaModelOperation.java:781) at org.eclipse.jdt.internal.core.SourceType.newSupertypeHierarchy(SourceType.java:726) at org.eclipse.jdt.internal.core.SourceType.newSupertypeHierarchy(SourceType.java:678) at org.eclipse.jdt.internal.corext.util.SuperTypeHierarchyCache.getTypeHierarchy(SuperTypeHierarchyCache.java:139) at org.eclipse.jdt.internal.corext.util.SuperTypeHierarchyCache.getTypeHierarchy(SuperTypeHierarchyCache.java:91) at org.eclipse.jdt.internal.ui.text.javadoc.JavadocContentAccess2$JavadocLookup.getTypeHierarchy(JavadocContentAccess2.java:383) at org.eclipse.jdt.internal.ui.text.javadoc.JavadocContentAccess2$JavadocLookup.getInheritedDescription(JavadocContentAccess2.java:337) at org.eclipse.jdt.internal.ui.text.javadoc.JavadocContentAccess2$JavadocLookup.getInheritedMainDescription(JavadocContentAccess2.java:254) at org.eclipse.jdt.internal.ui.text.javadoc.JavadocContentAccess2.toHTML(JavadocContentAccess2.java:768) at org.eclipse.jdt.internal.ui.text.javadoc.JavadocContentAccess2.javadoc2HTML(JavadocContentAccess2.java:620) at org.eclipse.jdt.internal.ui.text.javadoc.JavadocContentAccess2.getHTMLContentFromSource(JavadocContentAccess2.java:566) at org.eclipse.jdt.internal.ui.text.javadoc.JavadocContentAccess2.getHTMLContent(JavadocContentAccess2.java:458) at org.eclipse.jdt.internal.ui.text.java.hover.JavadocHover.getHoverInfo(JavadocHover.java:553) at org.eclipse.jdt.internal.ui.text.java.hover.JavadocHover.internalGetHoverInfo(JavadocHover.java:510) at org.eclipse.jdt.internal.ui.text.java.hover.JavadocHover.getHoverInfo2(JavadocHover.java:495) at org.eclipse.jdt.internal.ui.text.java.hover.BestMatchHover.getHoverInfo2(BestMatchHover.java:129) at org.eclipse.jdt.internal.ui.text.java.hover.JavaEditorTextHoverProxy.getHoverInfo2(JavaEditorTextHoverProxy.java:82) at org.eclipse.jface.text.TextViewerHoverManager$4.run(TextViewerHoverManager.java:166)
*** This bug has been marked as a duplicate of bug 254738 ***