(gdb) bt
#0 x86_64_fallback_frame_state (context=0x7ffd753098d0, context=0x7ffd753098d0, fs=0x7ffd753099c0) at ./md-unwind-support.h:58
#1 uw_frame_state_for (context=context@entry=0x7ffd753098d0, fs=fs@entry=0x7ffd753099c0) at ../../../libgcc/unwind-dw2.c:1253
#2 0x00007fbf17a14fb9 in _Unwind_Backtrace (trace=0x7fbf181f3410 <libgcc_backtrace_helper(_Unwind_Context*, void*)>,
trace_argument=0x7ffd75309b80) at ../../../libgcc/unwind.inc:290
#3 0x00007fbf181f316a in GetStackTraceWithContext_libgcc (result=<optimized out>, max_depth=<optimized out>, skip_count=<optimized out>,
ucp=<optimized out>) at src/stacktrace_libgcc-inl.h:100
#4 0x00007fbf181f396c in GetStackTraceWithContext (result=result@entry=0x7ffd75309bf8, max_depth=max_depth@entry=63,
skip_count=skip_count@entry=3, uc=0x7ffd75309e80) at src/stacktrace.cc:305
#5 0x00007fbf181f0aa9 in CpuProfiler::prof_handler (signal_ucontext=<optimized out>, cpu_profiler=0x7fbf183fa600 <CpuProfiler::instance_>,
sig=<optimized out>) at src/profiler.cc:360
#6 0x00007fbf181f1613 in ProfileHandler::SignalHandler (sig=27, sinfo=0x7ffd75309fb0, ucontext=0x7ffd75309e80) at src/profile-handler.cc:530
#7 <signal handler called>
#8 0x00007fbf18d52e58 in lj_vm_pcall () from /lib64/libluajit-5.1.so.2
#9 0x0000000000000001 in ?? ()
#10 0x00000000107bdf10 in ?? ()
#11 0x0000000040202378 in ?? ()
#12 0x0000000005811400 in ?? ()
#13 0x0000000005a009c7 in ?? ()
#14 0x0000000000517a6c in ngx_http_lua_cache_loadfile (log=0x107bdf10, L=0x5177cf <ngx_http_lua_cache_load_code+127>, L@entry=0x40202378,
script=0x5811400 "\004", cache_key=0xffffffffffffffff <Address 0xffffffffffffffff out of bounds>)
at /usr/src/debug/nginx-1.15.8/lua-nginx-module-0.10.14rc3/src/ngx_http_lua_cache.c:245
#15 0x000000000051ad63 in ngx_http_lua_header_filter_file (r=0x51de760)
at /usr/src/debug/nginx-1.15.8/lua-nginx-module-0.10.14rc3/src/ngx_http_lua_headerfilterby.c:215
#16 0x000000000051a840 in ngx_http_lua_header_filter (r=0x51de760)
at /usr/src/debug/nginx-1.15.8/lua-nginx-module-0.10.14rc3/src/ngx_http_lua_headerfilterby.c:277
#17 0x0000000000477ce4 in ngx_http_upstream_send_response (u=0x51cd1c0, r=0x51de760) at src/http/ngx_http_upstream.c:2911
#18 ngx_http_upstream_process_header (r=0x51de760, u=0x51cd1c0) at src/http/ngx_http_upstream.c:2439
#19 0x0000000000474e5f in ngx_http_upstream_handler (ev=0x117a40b0) at src/http/ngx_http_upstream.c:1289
#20 0x000000000044a664 in ngx_epoll_process_events (cycle=0x3105630, timer=<optimized out>, flags=<optimized out>)
at src/event/modules/ngx_epoll_module.c:902
#21 0x000000000043ebfa in ngx_process_events_and_timers (cycle=cycle@entry=0x3105630) at src/event/ngx_event.c:242
#22 0x00000000004480c5 in ngx_worker_process_cycle (cycle=cycle@entry=0x3105630, data="" at src/os/unix/ngx_process_cycle.c:750
#23 0x00000000004464be in ngx_spawn_process (cycle=cycle@entry=0x3105630, proc=proc@entry=0x448070 <ngx_worker_process_cycle>,
data=data@entry=0x6, name=name@entry=0x5855e3 "worker process", respawn=respawn@entry=-4) at src/os/unix/ngx_process.c:199
---Type <return> to continue, or q <return> to quit---
#24 0x0000000000447770 in ngx_start_worker_processes (cycle=cycle@entry=0x3105630, n=8, type=type@entry=-4) at src/os/unix/ngx_process_cycle.c:359
#25 0x00000000004490b9 in ngx_master_process_cycle (cycle=0x3105630, cycle@entry=0x1985f80) at src/os/unix/ngx_process_cycle.c:244
#26 0x000000000041c568 in main (argc=<optimized out>, argv=<optimized out>) at src/core/nginx.c:382
(gdb)
