Crash with invalid config

[reinerh]

When no config directory exists yet, and you run cdogs-sdl --help, a autosave.json file is generated with the following content.

$ rm -rf ~/.config/cdogs-sdl/
$ cdogs-sdl --help
C-Dogs SDL v2.0.0
SDL version 2.30.0
SDL_image version 2.8.2
SDL_mixer version 2.8.0
20240218-140856 INFO  [MAIN ] [files.c:670] SetupConfigDir(): Creating config dir /home/reiner/.config/cdogs-sdl/... 
20240218-140856 INFO  [MAIN ] [files.c:677] SetupConfigDir(): Config dir already exists.
Error loading config '/home/reiner/.config/cdogs-sdl/options.cnf'
20240218-140856 INFO  [MAIN ] [cdogs.c:141] main(): Command line (2 args): cdogs-sdl --help
Video Options:
    --fullscreen     Try and use a fullscreen video mode.
    --scale=n        Set pixel size to a factor of n
                       Factors: 1 - 16
    --screen=WxH     Set window size to W x H

Config:
    --config=K,V     Set arbitrary config option
                     Example: --config=Game.FriendlyFire=true
    --config         List all config options

Logging: logging is enabled per module and set at certain levels.
Log modules are: MAIN, NET, INPUT, ACTOR, SOUND, GFX, MAP, EDIT, PATH
Log levels are: TRACE, DEBUG, INFO, WARN, ERROR
    --log=M,L        Enable logging for module M at level L.

    --log=L          Enable logging for all modules at level L.

    --logfile=F      Log to file by filename

Other:
    --connect=host   (Experimental) connect to a game server
    --demo           (Experimental) run game for 30 seconds

20240218-140856 ERROR [NET  ] [net_client.c:78] NetClientTerminate(): Failed to shutdown listen socket: Socket operation on non-socket

{
	"Version": 3,
	"LastCampaignIndex": 0,
	"Missions": []
}

When cdogs-sdl is then started normally (without parameters), it crashes:

$ cdogs-sdl
C-Dogs SDL v2.0.0
SDL version 2.30.0
SDL_image version 2.8.2
SDL_mixer version 2.8.0
20240218-141050 INFO  [MAIN ] [files.c:670] SetupConfigDir(): Creating config dir /home/reiner/.config/cdogs-sdl/... 
20240218-141050 INFO  [MAIN ] [files.c:677] SetupConfigDir(): Config dir already exists.
Error loading config '/home/reiner/.config/cdogs-sdl/options.cnf'
20240218-141050 INFO  [MAIN ] [cdogs.c:141] main(): Command line (1 args): cdogs-sdl
20240218-141050 INFO  [GFX  ] [grafx.c:119] GraphicsInitialize(): graphics mode(320x240 2x)
20240218-141051 INFO  [MAIN ] [cdogs.c:192] main(): data dir(/usr/share/games/cdogs-sdl)
20240218-141051 INFO  [MAIN ] [cdogs.c:193] main(): config dir(/home/reiner/.config/cdogs-sdl/)
20240218-141052 INFO  [INPUT] [joystick.c:60] JoyInit(): 0 controllers found
20240218-141052 WARN  [MAIN ] [player_template.c:128] PlayerTemplatesLoad(): player templates file missing 'players.cnf'
20240218-141053 INFO  [MAIN ] [campaigns.c:200] LoadAllCampaigns(): Load campaigns from system...
20240218-141053 INFO  [MAIN ] [campaigns.c:204] LoadAllCampaigns(): Load campaigns from dir /usr/share/games/cdogs-sdl/missions...
20240218-141053 INFO  [MAIN ] [campaigns.c:209] LoadAllCampaigns(): Load dogfights from dir /usr/share/games/cdogs-sdl/dogfights...
20240218-141053 INFO  [MAIN ] [campaigns.c:213] LoadAllCampaigns(): Load quick play...
cdogs-sdl: ./src/cdogs/c_array.c:137: CArrayGet: Assertion `idx < a->size' failed.
Aborted (core dumped)

(gdb) bt
#0  __pthread_kill_implementation (threadid=<optimized out>, signo=signo@entry=6, no_tid=no_tid@entry=0) at ./nptl/pthread_kill.c:44
#1  0x00007ffad10b71cf in __pthread_kill_internal (signo=6, threadid=<optimized out>) at ./nptl/pthread_kill.c:78
#2  0x00007ffad1069472 in __GI_raise (sig=sig@entry=6) at ../sysdeps/posix/raise.c:26
#3  0x00007ffad10534b2 in __GI_abort () at ./stdlib/abort.c:79
#4  0x00007ffad10533d5 in __assert_fail_base
    (fmt=0x7ffad11c7dc8 "%s%s%s:%u: %s%sAssertion `%s' failed.\n%n", assertion=assertion@entry=0x558ec45397e4 "idx < a->size", file=file@entry=0x558ec45397ce "./src/cdogs/c_array.c", line=line@entry=137, function=function@entry=0x558ec4545978 <__PRETTY_FUNCTION__.4> "CArrayGet") at ./assert/assert.c:92
#5  0x00007ffad10623a2 in __assert_fail
    (assertion=assertion@entry=0x558ec45397e4 "idx < a->size", file=file@entry=0x558ec45397ce "./src/cdogs/c_array.c", line=line@entry=137, function=function@entry=0x558ec4545978 <__PRETTY_FUNCTION__.4> "CArrayGet")
    at ./assert/assert.c:101
#6  0x0000558ec4470e65 in CArrayGet (idx=0, a=0x558ec4574ec8 <gAutosave+8>) at ./src/cdogs/c_array.c:137
#7  0x0000558ec44723e9 in CArrayGet (a=0x558ec4574ec8 <gAutosave+8>, idx=0) at ./src/cdogs/c_array.c:137
#8  0x0000558ec4433984 in AutosaveGetLastCampaign (a=<optimized out>) at ./src/autosave.c:445
#9  0x0000558ec444377d in MenuCreateStart (name=0x558ec4538b97 "Start", l=0x7ffcb81ce5a0, mainMenu=0x558ec91136d0) at ./src/mainmenu.c:304
#10 MenuCreateAll (handlers=<optimized out>, l=0x7ffcb81ce5a0, data=0x558ec91136d0) at ./src/mainmenu.c:276
#11 MainMenu (graphics=graphics@entry=0x558ec459aba0 <gGraphicsDevice>, l=l@entry=0x7ffcb81ce5a0) at ./src/mainmenu.c:88
#12 0x0000558ec442fb95 in main (argc=<optimized out>, argv=<optimized out>) at ./src/cdogs.c:252

It seems to be related to LastCampaignIndex. When I start cdogs-sdl initially normally, then it is set to -1 instead of 0. And after changing it manually to -1, cdogs-sdl can also start successfully.

[cxong]

Nice find!