Bug 66043 Java editor not released when window closed
build I20040607-0800 - new window - open a Java editor - close window - ASTProvider maintains a ref to the editor: GC Roots -> Object EditorPane #013d394d: Reverse Paths | +---org.eclipse.ui.internal.EditorPane (#013d394d) | +---pane of org.eclipse.ui.internal.EditorSite (#0154c573) | +---partSite of org.eclipse.jdt.internal.ui.javaeditor.CompilationUnitEditor (#0006b4ee) | +---fActiveEditor of org.eclipse.jdt.internal.ui.javaeditor.ASTProvider (#00eea6dc) | +---fASTProvider of org.eclipse.jdt.internal.ui.JavaPlugin (#019777af) | +---fgJavaPlugin of org.eclipse.jdt.internal.ui.JavaPlugin (#01c0a077)
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/ASTProvider.java
return;
		
		if (DEBUG)
			System.out.println(DEBUG_PREFIX + "disposing AST: " + toString(fAST)); 
		
		fAST.setProperty(AST_DISPOSED, Boolean.TRUE);
		fAST= null;
		
		cache(null, null);
	}
	/**
	 * Returns a string for the given Java element used for debugging.
	 * 
	 * @param javaElement the compilation unit AST
	 * @return a string used for debugging
	 */
	private String toString(IJavaElement javaElement) {
		if (javaElement == null)
			return "null"; 
		else
			return javaElement.getElementName();
		
	}
	
	/**
	 * Returns a string for the given AST used for debugging.
	 * 
	 * @param ast the compilation unit AST
	 * @return a string used for debugging
	 */