Example:

    void foo(boolean condition)
    {
        try
        {
            // something
        }
        catch (RuntimeException ex)
        {
            if (condition)
            {
                ex = new RuntimeException("other message", ex);  // (*)
            }
            throw ex;
        }
    }

The hint is shown for the line marked with (*), although the created RuntimeException is thrown in the next statement.