Вот такой backlog получился

Reading symbols from /usr/local/nginx/sbin/nginx...done.
Core was generated by `nginx: worker process '.
Program terminated with signal 11, Segmentation fault.
#0 0xb758f06a in ?? ()
(gdb) bt
#0 0xb758f06a in ?? ()
#1 0x0807c12a in ngx_http_script_copy_code (e=0x9114ad8) at src/http/ngx_http_script.c:652
#2 0x08074752 in ngx_http_parse_request_line (r=0x90fa0f0, b=0x9114abc) at src/http/ngx_http_parse.c:250
#3 0x08093a63 in ngx_http_limit_zone_init (cf=0x90fa0f0) at src/http/modules/ngx_http_limit_zone_module.c:553
#4 0x0806a685 in ngx_http_send_header (r=0x0) at src/http/ngx_http_core_module.c:1679
#5 0x08067205 in ngx_epoll_add_connection (c=0x90fa0f0) at src/event/modules/ngx_epoll_module.c:329
#6 0x080698e7 in ngx_http_init_phase_handlers (cf=0x90fa0f0, cmd=0xbfe0e7e8, conf=0xbfe0e7e8) at src/http/ngx_http.c:592
#7 ngx_http_block (cf=0x90fa0f0, cmd=0xbfe0e7e8, conf=0xbfe0e7e8) at src/http/ngx_http.c:360
#8 0x0806ca72 in ngx_http_named_location (r=0x90fa0f0, name=0x190) at src/http/ngx_http_core_module.c:2190
#9 0x0806e54f in ngx_http_core_try_files (cf=0x90fa0f0, cmd=0x190, conf=0xbfe0e8a8) at src/http/ngx_http_core_module.c:3949
#10 0x0806fad2 in ngx_http_send_refresh (r=0x90fa0f0) at src/http/ngx_http_special_response.c:728
#11 0x0806da01 in ngx_http_map_uri_to_path (r=0x90fa0f0, path=0x0, root_length=0x200, reserved=14845) at src/http/ngx_http_core_module.c:1763
#12 0x080641f5 in ngx_setproctitle (title=0x90c8668 "\264\210\f\t@\206\f\tt\206\f\t\004") at src/os/unix/ngx_setproctitle.c:91
#13 0x0805d266 in ngx_crc32_long (cache=0x90c8668, name=0x0, of=0xbfe0e9cc, pool=0x376) at src/core/ngx_crc32.h:45
#14 ngx_open_cached_file (cache=0x90c8668, name=0x0, of=0xbfe0e9cc, pool=0x376) at src/core/ngx_open_file_cache.c:189
#15 0x08062e57 in ngx_add_channel_event (cycle=0x1, fd=0, event=151815784, handler=0x80acd28) at src/os/unix/ngx_channel.c:201
#16 0x08061699 in ngx_event_pipe_read_upstream (p=0x1, do_write=134622632) at src/event/ngx_event_pipe.c:363
#17 ngx_event_pipe (p=0x1, do_write=134622632) at src/event/ngx_event_pipe.c:43
#18 0x0806365e in ngx_process_get_status (signo=151815784) at src/os/unix/ngx_process.c:516
#19 ngx_signal_handler (signo=151815784) at src/os/unix/ngx_process.c:430
#20 0x0804b7cd in main (argc=1, argv=0xbfe0ed04) at src/core/nginx.c:385