Syslog-ng 3.3.2 (obtained from http://www.balabit.com/downloads/files?path=/syslog-ng/sources/3.3.2/source) is segfaulting when it tries to send a message to a TCP destination. I'm asking here instead of a bug report because I didnt see a 3.3.2 release announcement, so not sure if this is the final build or not.

Anyway, gdb backtrace shows:
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x40f67940 (LWP 29440)]
0x00002b047a812261 in log_pipe_queue (s=0x12d0d94f, msg=0x12d04400, path_options=0x40f64150) at logpipe.h:288
288          s->queue(s, msg, path_options, s->queue_data);
(gdb) where
#0  0x00002b047a812261 in log_pipe_queue (s=0x12d0d94f, msg=0x12d04400, path_options=0x40f64150) at logpipe.h:288
#1  0x00002b047a8121b2 in log_multiplexer_queue (s=0x12cd7e60, msg=0x12d04400, path_options=0x40f642d0, user_data=0x0) at logmpx.c:125
#2  0x00002b047a80ce2c in log_pipe_queue (s=0x12cd7e60, msg=0x12d04400, path_options=0x40f642d0) at logpipe.h:288
#3  0x00002b047a80cddb in log_pipe_forward_msg (self=0x12d0d810, msg=0x12d04400, path_options=0x40f642d0) at logpipe.h:275
#4  0x00002b047a80cd79 in log_filter_pipe_queue (s=0x12d0d810, msg=0x12d04400, path_options=0x40f642d0, user_data=0x0) at filter.c:698
#5  0x00002b047a812264 in log_pipe_queue (s=0x12d0d810, msg=0x12d04400, path_options=0x40f642d0) at logpipe.h:288
#6  0x00002b047a8121b2 in log_multiplexer_queue (s=0x12cd7e00, msg=0x12d04400, path_options=0x40f64550, user_data=0x0) at logmpx.c:125
#7  0x00002b047a82cd20 in log_pipe_queue (s=0x12cd7e00, msg=0x12d04400, path_options=0x40f64550) at logpipe.h:288
#8  0x00002b047a82cccf in log_pipe_forward_msg (self=0x12d127e0, msg=0x12d04400, path_options=0x40f64550) at logpipe.h:275
#9  0x00002b047a82cc8a in log_source_group_queue (s=0x12d127e0, msg=0x12d04400, path_options=0x40f64550, user_data=0x0) at sgroup.c:102
#10 0x00002b047a81ee1f in log_pipe_queue (s=0x12d127e0, msg=0x12d04400, path_options=0x40f64550) at logpipe.h:288
#11 0x00002b047a81edce in log_pipe_forward_msg (self=0x12d125a0, msg=0x12d04400, path_options=0x40f64550) at logpipe.h:275
#12 0x00002b047a81ee32 in log_pipe_queue (s=0x12d125a0, msg=0x12d04400, path_options=0x40f64550) at logpipe.h:292
#13 0x00002b047a81edce in log_pipe_forward_msg (self=0x12cfb920, msg=0x12d04400, path_options=0x40f64550) at logpipe.h:275
#14 0x00002b047a81ee32 in log_pipe_queue (s=0x12cfb920, msg=0x12d04400, path_options=0x40f64550) at logpipe.h:292
#15 0x00002b047a81edce in log_pipe_forward_msg (self=0x12cd8800, msg=0x12d04400, path_options=0x40f64550) at logpipe.h:275
#16 0x00002b047a81eccc in log_source_queue (s=0x12cd8800, msg=0x12d04400, path_options=0x40f645f0, user_data=0x0) at logsource.c:290
#17 0x00002b047a81c969 in log_pipe_queue (s=0x12cd8800, msg=0x12d04400, path_options=0x40f645f0) at logpipe.h:288
#18 0x00002b047a81c919 in log_reader_handle_line (self=0x12cd8800,
    line=0x12d09800 "<22>Nov 14 02:48:00 postfix/smtpd[23425]: connect from slider.dev.usa.net[165.212.101.17]\n", length=89, saddr=0x0) at logreader.c:503
#19 0x00002b047a81cadd in log_reader_fetch_log (self=0x12cd8800) at logreader.c:561
#20 0x00002b047a81be25 in log_reader_work_perform (s=0x12cd8800) at logreader.c:115
#21 0x00002b047a824648 in main_loop_io_worker_job_start (self=0x12cd8a98) at mainloop.c:367
#22 0x00002b047a86ae96 in iv_work_thread_got_event (_thr=0x12cdb1f0) at iv_work.c:113
#23 0x00002b047a869e17 in iv_event_run_pending_events (_dummy=0x0) at iv_event.c:67
#24 0x00002b047a86a3db in iv_event_raw_got_event (_this=0x40f67858) at iv_event_raw.c:82
#25 0x00002b047a866945 in iv_run_active_list (active=0x40f64c20) at iv_main.c:219
#26 0x00002b047a866b83 in iv_main () at iv_main.c:269
#27 0x00002b047a86b290 in iv_work_thread (_thr=0x12cdb1f0) at iv_work.c:196
#28 0x00002b047a86b81a in iv_thread_handler (_thr=0x12cda400) at iv_thread.c:100
#29 0x00000039820064a7 in start_thread () from /lib64/libpthread.so.0
#30 0x00000039818d3c2d in clone () from /lib64/libc.so.6



Config:
@version: 3.3

options {
    time_reopen(1);
    use_dns(no);
    use_fqdn(yes);
    keep_hostname(yes);
    normalize_hostnames(yes);
    create_dirs(yes);
    dir_perm(0755);
    perm(0644);
    mark_freq(0);
    threaded(yes);
};

@include "scl.conf"

source s_local {
    system();
    internal();
};
filter f_mail {
    facility(mail);
};
destination d_central {
    tcp('syslog.usa.net' port(514) log_fifo_size(50000));
};
log { source(s_local); filter(f_mail); destination(d_central); };