[Bug-apl] Crash attempting to open nonexistent file from command line

[David B. Lamkins]

$ apl -f nosuchfile
                                       
                    ______ _   __ __  __    ___     ____   __ 
                   / ____// | / // / / /   /   |   / __ \ / / 
                  / / __ /  |/ // / / /   / /| |  / /_/ // /  
                 / /_/ // /|  // /_/ /   / ___ | / ____// /___
                 \____//_/ |_/ \____/   /_/  |_|/_/    /_____/
                                       
                     Welcome to GNU APL version 1.3 / 7095
                                       
                Copyright (C) 2008-2014  Dr. Jürgen Sauermann
                       Banner by FIGlet: www.figlet.org
                                       
                This program comes with ABSOLUTELY NO WARRANTY;
                          for details run: apl --gpl.
                                       
     This program is free software, and you are welcome to redistribute
it
         according to the GNU Public License (GPL) version 3 or later.
                                       

could not open nosuchfile


====================================================
SEGMENTATION FAULT

----------------------------------------
-- Stack trace at main.cc:121
----------------------------------------
0x7fd886d3bd65 __libc_start_main
0x435645  main
0x5297ed   Workspace::immediate_execution(bool)
0x46beed    Command::process_line()
0x480645     Input::get_line()
0x502795      IO_Files::get_file_line()
0x501558       IO_Files::open_next_file()
0x7fd8889fd750        
0x485c0a         
========================================
====================================================

Goodbye.
$