[NEEDS INFO] Segmentation fault loading nearly all scenarios

[zoot]

When starting a new match on "Punjab 1", just after the map finish loading, the game crashes. This is the backtrace:

#0  0x00007fb2ff57e3d6 in ?? () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x00007fb2c2959d80 in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#2  0x00007fb2c295a18e in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#3  0x00007fb2c295a576 in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#4  0x00007fb2c296bb02 in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#5  0x00007fb2c29591a7 in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#6  0x00007fb2c24d43da in ?? () from /usr/lib/x86_64-linux-gnu/libdricore9.0.2.so.1
#7  0x00007fb2c24d53b4 in ?? () from /usr/lib/x86_64-linux-gnu/libdricore9.0.2.so.1
#8  0x00007fb2c24d54fc in ?? () from /usr/lib/x86_64-linux-gnu/libdricore9.0.2.so.1
#9  0x00007fb2c24d55e0 in ?? () from /usr/lib/x86_64-linux-gnu/libdricore9.0.2.so.1
#10 0x00000000006b1922 in InstancingModelRenderer::RenderModel (this=0x289a570, shader=..., model=<optimized out>)
    at ../../../source/renderer/InstancingModelRenderer.cpp:383
#11 0x00000000006bafda in ShaderModelRenderer::Render (this=0x289a6b0, modifier=..., context=..., flags=0)
    at ../../../source/renderer/ModelRenderer.cpp:733
#12 0x000000000068687a in CRendererInternals::CallTranspModelRenderers (this=0x26e6ae0, context=..., flags=flags@entry=0)
    at ../../../source/renderer/Renderer.cpp:385
#13 0x000000000067e813 in CRenderer::RenderTransparentModels (this=this@entry=0x2712300, context=..., 
    transparentMode=transparentMode@entry=TRANSPARENT_OPAQUE, frustum=frustum@entry=0x0) at ../../../source/renderer/Renderer.cpp:1060
#14 0x00000000006809ff in CRenderer::RenderSubmissions (this=this@entry=0x2712300) at ../../../source/renderer/Renderer.cpp:1546
#15 0x0000000000680fbc in CRenderer::RenderScene (this=0x2712300, scene=...) at ../../../source/renderer/Renderer.cpp:1779
#16 0x00000000005b05b9 in Render () at ../../../source/ps/GameSetup/GameSetup.cpp:218
#17 0x0000000000568b23 in CGame::ReallyStartGame (this=0x3a0e880) at ../../../source/ps/Game.cpp:216
#18 0x0000000000426186 in ProgressiveLoad () at ../../../source/main.cpp:249
#19 Frame () at ../../../source/main.cpp:347
#20 RunGameOrAtlas (argc=argc@entry=1, argv=argv@entry=0x7fff6ed4f3d8) at ../../../source/main.cpp:508
#21 0x000000000041b2d7 in main (argc=1, argv=0x7fff6ed4f3d8) at ../../../source/main.cpp:551

I do not get the crash on "Combat Demo", but I do get it on "Zagros Mountains 1", "Saharan Oases" and likely others. I do not get it on any random maps.

I am using this revision: ​https://github.com/0ad/0ad/commit/9da1d2bf9c97a997fa70c4b0a769ab2a37a262a5

It could be a change or bug in a some driver that was recently autoupdated on my system, but I can't know.

[zoot]

Since I only get it on standard scenario maps, could it perhaps be some fancy graphics effect enabled on those, but not on random and demo maps?

[leper]

Do you have GLSL shaders enabled?

If yes could you try to narrow it down to some effect on a specific map? (commenting it out in the map xml)

[historic_bruno]

Which OS and which graphics drivers are you using? Did this map work for you recently?

[zoot]

I'm using Ubuntu 12.10. How can I tell what drivers I am using? If I launch the 'jockey-kde' tool in Ubuntu, it says "No proprietary drivers are in use on this system." So I assume I am using mesa or something?

[zoot]

Replying to leper:

Do you have GLSL shaders enabled?

I only get the error with GLSL enabled, yes. If I disable GLSL I get weird artifacts (patches of black terrain), though that has always been the case.

[zoot]

Installing NVIDIAs proprietary drivers broke my system, so I may try installing the PPA drivers that fabio sometimes link to. (Though that seems somewhat of a pain in the b*tt. Why can't they just make it work out of the box?)

[historic_bruno]

Replying to zoot:

I'm using Ubuntu 12.10. How can I tell what drivers I am using?

system_info.txt in the game's log directory should tell you, I don't know if there's a better way in Ubuntu/Linux since I don't use it often enough.

[zoot]

It says I'm using 3.0 Mesa 9.0.2; OpenGL 3.0 Mesa 9.0.2.

[Markus]

Have you updated mesa? Stable is 9.1.2.