Can you recompile with the debug option and without compiler optimizations, create a coredump and backtrace it:
# compile (debug + no optimizations) make DEBUG=-DDEBUG_FULL CFLAGS="-g -O0" TARGET=[...] # reise ulimit ulimit -c 750000000 # enable coredumping echo 2 > /proc/sys/fs/suid_dumpable # dump core to /tmp/core[...] echo "/tmp/core-%e-%s-%u-%g-%p-%t" > /proc/sys/kernel/core_pattern # install gdb and do backtracing apt-get install gdb gdb /path/to/haproxy /tmp/core[...] bt backtrace full Then send the output ot gdb (bt and backtrace full). Thanks Lukas
