Core was generated by `./minetestserver'.
Program terminated with signal 6, Aborted.
#0  0xb78b3424 in __kernel_vsyscall ()
(gdb) thread apply all bt

Thread 3 (Thread 12922):
#0  0xb78b3424 in __kernel_vsyscall ()
#1  0xb7676406 in nanosleep () at ../sysdeps/unix/syscall-template.S:82
#2  0xb76a566c in usleep (useconds=30000)
    at ../sysdeps/unix/sysv/linux/usleep.c:33
#3  0x080dcf54 in dedicated_server_loop (server=..., kill=@0x81d90a8)
    at /home/celeron55/softat/minetest/src/server.cpp:4460
#4  0x08121e8b in main (argc=Cannot access memory at address 0x0
)
    at /home/celeron55/softat/minetest/src/servermain.cpp:363

Thread 2 (Thread 13002):
#0  0xb78b3424 in __kernel_vsyscall ()
#1  0xb76b8db1 in __lll_lock_wait_private ()
    at ../nptl/sysdeps/unix/sysv/linux/i386/i686/../i486/lowlevellock.S:95
#2  0xb764fba7 in _L_lock_9661 () from /lib/i386-linux-gnu/i686/cmov/libc.so.6
#3  0xb764e3d6 in __libc_free (mem=0xb571b528) at malloc.c:3736
#4  0xb782dded in __cxa_free_exception ()
   from /usr/lib/i386-linux-gnu/libstdc++.so.6
#5  0xb782f5c7 in ?? () from /usr/lib/i386-linux-gnu/libstdc++.so.6
#6  0xb774fd6b in _Unwind_DeleteException ()
   from /lib/i386-linux-gnu/libgcc_s.so.1
#7  0xb782e380 in __cxa_end_catch () from /usr/lib/i386-linux-gnu/libstdc++.so.6
#8  0x080c3c82 in con::Connection::checkIncomingBuffers (this=0xbfae50c8, 
    channel=0x97b56ac, peer_id=@0xb7464274, dst=...)
    at /home/celeron55/softat/minetest/src/connection.cpp:1222
#9  0x080c3d54 in con::Connection::getFromBuffers (this=0xbfae50c8, 
    peer_id=@0xb7464274, dst=...)
    at /home/celeron55/softat/minetest/src/connection.cpp:1198
---Type <return> to continue, or q <return> to quit---
#10 0x080c5ad4 in con::Connection::receive (this=0xbfae50c8)
    at /home/celeron55/softat/minetest/src/connection.cpp:684
#11 0x080c75d3 in con::Connection::Thread (this=0xbfae50c8)
    at /home/celeron55/softat/minetest/src/connection.cpp:575
#12 0x081255b0 in JThread::TheThread (param=0xbfae50c8)
    at /home/celeron55/softat/minetest/src/jthread/pthread/jthread.cpp:166
#13 0xb7875c39 in start_thread (arg=0xb7464b70) at pthread_create.c:304
#14 0xb76ab96e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130

Thread 1 (Thread 13003):
#0  0xb78b3424 in __kernel_vsyscall ()
#1  0xb7609911 in raise (sig=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
#2  0xb760cd42 in abort () at abort.c:92
#3  0xb763f9d5 in __libc_message (do_abort=2, 
    fmt=0xb7714a90 "*** glibc detected *** %s: %s: 0x%s ***\n")
    at ../sysdeps/unix/sysv/linux/libc_fatal.c:189
#4  0xb7649ac1 in malloc_printerr (action=<value optimized out>, 
    str=0x6 <Address 0x6 out of bounds>, ptr=0xb58fdca8) at malloc.c:6283
#5  0xb764b328 in _int_free (av=<value optimized out>, p=<value optimized out>)
    at malloc.c:4795
#6  0xb764e3dd in __libc_free (mem=0xb58fdca8) at malloc.c:3738
#7  0xb782da3f in operator delete(void*) ()
   from /usr/lib/i386-linux-gnu/libstdc++.so.6
#8  0xb782da9b in operator delete[](void*) ()
   from /usr/lib/i386-linux-gnu/libstdc++.so.6
#9  0x080c7fe4 in SharedBuffer<unsigned char>::drop (this=0xb6c632c8)
    at /home/celeron55/softat/minetest/src/utility.h:482
#10 0x080c4bec in ~SharedBuffer (this=0xbfae50c8, peer_id=@0x0, data=0x0, 
    datasize=10000) at /home/celeron55/softat/minetest/src/utility.h:459
---Type <return> to continue, or q <return> to quit---
#11 ~ConnectionEvent (this=0xbfae50c8, peer_id=@0x0, data=0x0, datasize=10000)
    at /home/celeron55/softat/minetest/src/connection.h:429
#12 con::Connection::Receive (this=0xbfae50c8, peer_id=@0x0, data=0x0, 
    datasize=10000) at /home/celeron55/softat/minetest/src/connection.cpp:1583
#13 0x080e95e1 in Server::Receive (this=0xbfae5028)
    at /home/celeron55/softat/minetest/src/server.cpp:1787
#14 0x080e975d in ServerThread::Thread (this=0xbfae52a8)
    at /home/celeron55/softat/minetest/src/server.cpp:93
#15 0x081255b0 in JThread::TheThread (param=0xbfae52a8)
    at /home/celeron55/softat/minetest/src/jthread/pthread/jthread.cpp:166
#16 0xb7875c39 in start_thread (arg=0xb6c63b70) at pthread_create.c:304
#17 0xb76ab96e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130