Bug 27878 infinite loop?
build N1206 on Win2K, IBM VM 1.3.1 in the big workspace I started up, opened the java perspective and navigated to org.eclipse.core.resources/src. When I clicked to expand the src folder my CPU went to 100% for alone time (forever?). Using ctrl-break I got the attached core dump which indicates that the RenameSupport.create() method appears to be called infinitely. Note that memory use does not seem to be increasing.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/reorg/IRefactoringRenameSupport.java
/*
 * (c) Copyright IBM Corp. 2000, 2001.
 * All Rights Reserved.
 */
package org.eclipse.jdt.internal.ui.reorg;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.jdt.core.JavaModelException;
/**
 * Abstraction layer for renaming using refactoring.
 */
public interface IRefactoringRenameSupport {
	
	/**
	 * whether the rename action should be enabled
	 */
	public boolean canRename(Object element) throws JavaModelException;
	
	/**
	 * Do the rename
	 */
	public void rename(Shell parent, Object element) throws JavaModelException;
}