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Found a 31 line (120 tokens) duplication in the following files: 
Starting at line 979 of /home/tom/data/cf-dashboard/working/javaiopatch/src/java/io/ObjectOutputStream.java
Starting at line 1183 of /home/tom/data/cf-dashboard/working/javaiopatch/src/java/io/ObjectInputStream.java
	synchronized (subclassAudits) {
	    Boolean result = (Boolean) subclassAudits.get(cl);
	    if (result == null) {
		/*
		 * Note: only new Boolean instances (i.e., not Boolean.TRUE or
		 * Boolean.FALSE) must be used as cache values, otherwise cache
		 * entry will pin associated class.
		 */
		result = new Boolean(auditSubclass(cl));
		subclassAudits.put(cl, result);
	    }
	    if (result.booleanValue()) {
		return;
	    }
	}
	SecurityManager sm = System.getSecurityManager();
	if (sm != null) {
	    sm.checkPermission(SUBCLASS_IMPLEMENTATION_PERMISSION);
	}
    }

    /**
     * Performs reflective checks on given subclass to verify that it doesn't
     * override security-sensitive non-final methods.  Returns true if subclass
     * is "safe", false otherwise.
     */
    private static boolean auditSubclass(final Class subcl) {
	Boolean result = (Boolean) AccessController.doPrivileged(
	    new PrivilegedAction() {
		public Object run() {
		    for (Class cl = subcl;