Program received signal SIGSEGV, Segmentation fault.
0x000000000045228c in lighter::RadMaterial::IsTextureValid (this=0x0)
    at /home/soak/src/cs/apps/tools/lighter2/material.h:115
115         bool IsTextureValid() const {return isTexImageValid;}
(gdb) bt
#0  0x000000000045228c in lighter::RadMaterial::IsTextureValid (this=0x0)
    at /home/soak/src/cs/apps/tools/lighter2/material.h:115
#1  0x0000000000453ebf in lighter::PhotonmapperLighting::EmitPhoton (sect=@0x7fffffffd780, photon=...,
    maxDepth=@0x7fffffffd8a8, depth=@0x7fffffffd5d8, ignoreDirect=@0x7fffffffd707, produceCaustic=false)
    at /home/soak/src/cs/apps/tools/lighter2/photonmapperlighting.cpp:593
#2  0x00000000004543cb in lighter::PhotonmapperLighting::EmitPhoton (sect=@0x7fffffffd780, photon=...,
    maxDepth=@0x7fffffffd8a8, depth=@0x7fffffffd708, ignoreDirect=@0x7fffffffd707, produceCaustic=false)
    at /home/soak/src/cs/apps/tools/lighter2/photonmapperlighting.cpp:645
#3  0x00000000004556d8 in lighter::PhotonmapperLighting::EmitPhotons (.omp_data_i=0x7fffffffd8b0)
    at /home/soak/src/cs/apps/tools/lighter2/photonmapperlighting.cpp:382
#4  0x00000000004533bf in lighter::PhotonmapperLighting::EmitPhotons (this=0x7fffffffdbe0, sect=0x7fffe078b160,
    progress=...) at /home/soak/src/cs/apps/tools/lighter2/photonmapperlighting.cpp:345
#5  0x000000000041344d in lighter::Lighter::BuildPhotonMaps (this=0x702850)
    at /home/soak/src/cs/apps/tools/lighter2/lighter.cpp:455
#6  0x0000000000412da2 in lighter::Lighter::LightEmUp (this=0x702850)
    at /home/soak/src/cs/apps/tools/lighter2/lighter.cpp:334
#7  0x0000000000411968 in lighter::Lighter::Run (this=0x702850) at /home/soak/src/cs/apps/tools/lighter2/lighter.cpp:105
#8  0x0000000000414f33 in main (argc=9, argv=0x7fffffffde48) at /home/soak/src/cs/apps/tools/lighter2/lighter.cpp:941