From: "Jonathan Polley" <[EMAIL PROTECTED]>
> When I rebuilt the MacOS X version of FlightGear, after the 3D cloud
> code was added, I started getting an EXC_BAD_ACCESS runtime error. I
> did some looking around with gdb and found out that the error was
> happening BEFORE the main was being called.
>
> Program received signal EXC_BAD_ACCESS, Could not access memory.
> 0x90989544 in glGetIntegerv ()
> (gdb) backtrace
> #0 0x90989544 in glGetIntegerv ()
> #1 0x002130b8 in SkyTextureState::SkyTextureState() (this=0x41e0478)
> at SkyTextureState.cpp:47
> #2 0x00212814 in SkyMaterial::SkyMaterial() (this=0x41e03d0) at
> SkyMaterial.cpp:60
> #3 0x0016df60 in SkyLight::SkyLight(SkyLight::SkyLightType) (this=0x0,
^^^^^^^^
Very strange !
> eType=3221223248) at SkyLight.cpp:67
^^^^^^^^^^
Strange too !
> #4 0x003167c4 in __static_initialization_and_destruction_0(int, int) ()
> #5 0x8fe16594 in __dyld_call_module_initializers_for_objects ()
> #6 0x8fe160a0 in __dyld_call_module_initializers ()
> #7 0x8fe133ac in __dyld__dyld_make_delayed_module_initializer_calls ()
> #8 0x00002c04 in _call_mod_init_funcs () at
> /SourceCache/Csu/Csu-45/crt.c:299
> #9 0x00002aec in _start (argc=1, argv=0xbffffc54, envp=0xbffffc5c) at
> /SourceCache/Csu/Csu-45/crt.c:217
> #10 0x00002a4c in start ()
>
> How is this possible? If this were Ada, I would say that it is
> happening during Elaboration, but I'm not sure if C++ has something
> similar. SkyLight::SkyLight is creating a new instance of SkyMaterial,
> and my bet is that glGetIntegerv is having the problem because OpenGL
> hasn't been initialized yet.
I don't looked at the code but it seems that there is a SkyLight global
variable (or a static member one) defined. However, the fact that the
constructor is called with a this null pointer seems odd to me.
Cheers,
-Fred
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