[vtkusers] segfault with Opengl2 in 6.3.0.rc2

[marcin.krotkiewski]

I keep getting segfaults when using vtk.sample.VTKCanvas with OpenGL2 
backend in 6.3.0.rc2. This does not happen with 6.2.0 + OpenGL2, nor 
with the standard OpenGL backend. I use ubuntu 14.04 and compile with 
gcc 4.9.2 and jdk1.8.0_60.

On my laptop, the segfaults are 100 reproducible with mesa library - 
some lines from glxinfo:


OpenGL renderer string: Mesa DRI Intel(R) Haswell Mobile
OpenGL core profile version string: 3.3 (Core Profile) Mesa 10.1.3
OpenGL core profile shading language version string: 3.30


When I use the high performance card (fglrx drivers,  Radeon HD 8790M) 
the segfaults sometimes happen, sometimes not. Lines from glxinfo:


OpenGL vendor string: Advanced Micro Devices, Inc.
OpenGL renderer string: AMD Radeon HD 8790M
OpenGL core profile version string: 4.3.13374 Core Profile Context 
15.20.1013
OpenGL core profile shading language version string: 4.40


I have attached a simplified java code based on VTKCanvas - In my 
experience this one segfaults always, both with mesa, and with Radeon 
drivers. I get the following line before vtk dies:


ERROR: In 
/home/angainor/bergverk/vtk/VTK-6.3.0.rc2/Rendering/OpenGL2/vtkOpenGLRenderWindow.cxx, 
line 412
vtkXOpenGLRenderWindow (0x7f110429aa90): GLEW could not be initialized.


And this is the top of the stack reported by the dying Java VM


R11=0x00007fcbd8a79840: <offset 0x72840> in /usr/lib/fglrx/libGL.so.1 at 
0x00007fcbd8a07000

Stack: [0x00007fcbb94e4000,0x00007fcbb95e5000], sp=0x00007fcbb95e1148,  
free space=1012k
Java frames: (J=compiled Java code, j=interpreted, Vv=VM code)
j  vtk.vtkRenderWindow.Render_9()V+0
j  vtk.vtkRenderWindow.Render()V+1
j  vtk.vtkPanel.Render()V+164
j  vtk.vtkPanel.paint(Ljava/awt/Graphics;)V+1

[...]


It seems that this is a problem specific to 6.3.0.rc2 with OpenGL2. I 
could not reproduce it for 6.2.0, nor when using OpenGL backend. Do you 
know any reason why this could happen? I will be happy to provide more 
information and help to solve this.

Cheers,

Marcin

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