Bug#711350: alienblaster: segmentation fault on exit

[Markus Koschany]

Hi,

here are the requested additional information.

My architecture is amd64. I'm running the game under Gnome3 and i use a
NVidia graphic card 9600 GT with nouveau drivers.

It appears the root cause of this bug lies in the SDL library.

gdb backtrace: I had installed libsdl1.2-dbg.

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff7925fe4 in SDL_JoystickClose (joystick=0x809bd0) at
../../src/joystick/SDL_joystick.c:373
373	../../src/joystick/SDL_joystick.c: No such file or directory.


Alienblaster checks for joysticks in src/input.cc and seemingly detects
my USB keyboard as a joystick which then leads to a segmentation fault.
(I don't use a joystick at all) I don't know why the backtrace says "No
such file or directory" though.

My keyboard is detected as Logitech, Inc. iTouch Composite. (lsusb)

I had another recent problem with whichwayisup. Almost the same issue
but the game didn't want to start in the first place.

http://bugs.debian.org/710162

I added an additional check for joystick axes. Although my keyboard is
detected by SDL as a joystick, the function returns 0 for joystick axes.
Normally it should return a positive integer.



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