it says "assert aircraftBase failed".
ufo: src/client/campaign/cp_produce_callbacks.c :160 : PR_UpdateProductionList: L'assertion << aircraftBase >> a ?chou?.
./ufo(Sys_Backtrace+0x1f)[./src/ports/unix/unix_main.c:394 Sys_Backtrace()]
./ufo[./src/ports/unix/unix_main.c:415 Sys_Signal()]
[0x772400]
/lib/tls/i686/cmov/libc.so.6(abort+0x182)[??:0 ??()]
/lib/tls/i686/cmov/libc.so.6(__assert_fail+0xf8)[??:0 ??()]
./ufo[./src/client/campaign/cp_produce_callbacks.c:161 PR_UpdateProductionList()]
./ufo[./src/client/campaign/cp_produce_callbacks.c:518 PR_ProductionType_f()]
./ufo(Cmd_ExecuteString+0xcb)[./src/common/cmd.c:990 Cmd_ExecuteString()]
./ufo(Cbuf_Execute+0x162)[./src/common/cmd.c:242 Cbuf_Execute()]
./ufo[./src/client/cl_main.c:1127 CL_SendCommand()]
./ufo(CL_Frame+0xe2)[./src/client/cl_main.c:1258 CL_Frame()]
./ufo[./src/common/common.c:1200 tick_timer()]
./ufo(Qcommon_Frame+0x7b)[./src/common/common.c:1348 Qcommon_Frame()]
./ufo(main+0x5c)[./src/ports/linux/linux_main.c:54 main()]
/lib/tls/i686/cmov/libc.so.6(__libc_start_main+0xe6)[??:0 ??()]
./ufo[??:0 _start()]
./ufo(Sys_Backtrace+0x1f)[./src/ports/unix/unix_main.c:394 Sys_Backtrace()]
./ufo(Sys_Error+0x22)[./src/ports/unix/unix_main.c:87 Sys_Error()]
./ufo(Sys_InitSignals+0x0)[./src/ports/unix/unix_main.c:422 Sys_InitSignals()]
[0x772400]
/lib/tls/i686/cmov/libc.so.6(abort+0x182)[??:0 ??()]
/lib/tls/i686/cmov/libc.so.6(__assert_fail+0xf8)[??:0 ??()]
./ufo[./src/client/campaign/cp_produce_callbacks.c:161 PR_UpdateProductionList()]
./ufo[./src/client/campaign/cp_produce_callbacks.c:518 PR_ProductionType_f()]
./ufo(Cmd_ExecuteString+0xcb)[./src/common/cmd.c:990 Cmd_ExecuteString()]
./ufo(Cbuf_Execute+0x162)[./src/common/cmd.c:242 Cbuf_Execute()]
./ufo[./src/client/cl_main.c:1127 CL_SendCommand()]
./ufo(CL_Frame+0xe2)[./src/client/cl_main.c:1258 CL_Frame()]
./ufo[./src/common/common.c:1200 tick_timer()]
./ufo(Qcommon_Frame+0x7b)[./src/common/common.c:1348 Qcommon_Frame()]
./ufo(main+0x5c)[./src/ports/linux/linux_main.c:54 main()]
/lib/tls/i686/cmov/libc.so.6(__libc_start_main+0xe6)[??:0 ??()]
./ufo[??:0 _start()]
Error: Received signal 6.