Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 1840.0x8d8]
0x77c33509 in msvcrt!__argc () from C:\WINDOWS\system32\msvcrt.dll
(gdb) thread apply all bt

Thread 3 (Thread 1840.0xd8c):
#0  0x0041db65 in MapBlock::getNodeParent (this=0xa846390, p=...)
    at src/mapblock.cpp:38
#1  0x0041ded9 in MapBlock::getNodeMaterial (this=0xa98e218, p=Cannot access mem
ory at address 0x4
)
    at src/mapblock.cpp:166
#2  0x0041f154 in MapBlock::updateFastFaceRow (this=0xa846390, startpos=Cannot a
ccess memory at address 0xa4e000c
)
    at src/mapblock.cpp:220
#3  0x0041f6d7 in MapBlock::updateMesh (this=0xa846390)
    at src/mapblock.cpp:315
#4  0x00425c07 in Map::updateMeshes (this=0x948f420, blockpos=...)
    at src/map.cpp:1129
#5  0x0041049f in ~LazyMeshUpdater (this=0xa4efdc4, __in_chrg=<optimized out>)
    at src/client.h:116
#6  Client::AsyncProcessData (this=0x22f4bc) at src/client.cpp:1220
#7  0x00410606 in ClientUpdateThread::Thread (this=0x22f4c0)
    at src/client.cpp:31
#8  0x00435187 in JThread::TheThread ()
#9  0x77c3a3b6 in msvcrt!_endthreadex () from C:\WINDOWS\system32\msvcrt.dll
#10 0x7c80b729 in KERNEL32!GetModuleFileNameA ()
   from C:\WINDOWS\system32\kernel32.dll
#11 0x00000000 in ?? ()

Thread 2 (Thread 1840.0x8d8):
#0  0x77c33509 in msvcrt!__argc () from C:\WINDOWS\system32\msvcrt.dll
#1  0x00000000 in ?? ()

Thread 1 (Thread 1840.0xdf0):
#0  0x77c33322 in msvcrt!__argc () from C:\WINDOWS\system32\msvcrt.dll
#1  0x77c5f958 in msvcrt!__crtCompareStringA ()
   from C:\WINDOWS\system32\msvcrt.dll
#2  0x77c5f79a in msvcrt!__crtCompareStringA ()
   from C:\WINDOWS\system32\msvcrt.dll
#3  0x77c5f958 in msvcrt!__crtCompareStringA ()
   from C:\WINDOWS\system32\msvcrt.dll
warning: (Internal error: pc 0x1 in read in psymtab, but not in symtab.)

warning: (Internal error: pc 0x1 in read in psymtab, but not in symtab.)

#4  0x00000002 in ?? ()
warning: (Internal error: pc 0x1 in read in psymtab, but not in symtab.)

#5  0x0022ee14 in ?? ()
#6  0x77c3356a in msvcrt!__argc () from C:\WINDOWS\system32\msvcrt.dll
#7  0x0a6779c0 in ?? ()
#8  0x77c33bf5 in msvcrt!__argc () from C:\WINDOWS\system32\msvcrt.dll
#9  0x00000000 in ?? ()
(gdb)