Crashing if you load content by unzip rom

[sergiobenrocha2]

If you try load rom by unzip it first (Detect Core or simple Load Content), you get a crash.

gdb retroarch
GNU gdb (Ubuntu 7.7.1-0ubuntu5~14.04.2) 7.7.1
Copyright (C) 2014 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from retroarch...(no debugging symbols found)...done.
(gdb) run
Starting program: /usr/bin/retroarch 
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7fffe5f9c700 (LWP 14983)]
0
[Thread 0x7fffe5f9c700 (LWP 14983) exited]
Opening cartridge file /home/sergio/Games/Atari 7800/Asteroids (USA).zip#Asteroids (USA).a78.Cartridge.cpp
Failed to open the cartridge file /home/sergio/Games/Atari 7800/Asteroids (USA).zip#Asteroids (USA).a78 for reading.Cartridge.cpp
RetroArch [ERROR] :: load_content :: Failed to load game.

Program received signal SIGSEGV, Segmentation fault.
0x0000000000000000 in ?? ()
(gdb) bt full
#0  0x0000000000000000 in ?? ()
No symbol table info available.
#1  0x0000000000443b4b in ?? ()
No symbol table info available.
#2  0x00000000004103c7 in ?? ()
No symbol table info available.
#3  0x0000000000414b75 in ?? ()
No symbol table info available.
#4  0x0000000000466ab6 in ?? ()
No symbol table info available.
#5  0x00000000004188c7 in ?? ()
No symbol table info available.
#6  0x000000000040e0f5 in ?? ()
No symbol table info available.
#7  0x00007ffff284dec5 in __libc_start_main (main=0x40e060, argc=1, argv=0x7fffffffdf98, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, 
    stack_end=0x7fffffffdf88) at libc-start.c:287
        result = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, 1904257585204123383, 4252052, 140737488347024, 0, 0, -1904257586238105865, -1904269311521499401}, mask_was_saved = 0}}, 
          priv = {pad = {0x0, 0x0, 0x4aa870, 0x7fffffffdf98}, data = {prev = 0x0, cleanup = 0x0, canceltype = 4892784}}}
        not_first_call = <optimized out>
#8  0x000000000040e1bd in ?? ()
No symbol table info available.