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Copyright (C) 2014 Free Software Foundation, Inc.
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Reading symbols from /usr/sbin/nginx...Reading symbols from /usr/lib/debug//usr/sbin/nginx...done.
done.
[New LWP 21506]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Core was generated by `nginx: worker pr'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  ngx_http_v2_close_stream (stream=0x1c2699f0, rc=rc@entry=0) at src/http/v2/ngx_http_v2.c:3805
3805	src/http/v2/ngx_http_v2.c: No such file or directory.
(gdb) bt
#0  ngx_http_v2_close_stream (stream=0x1c2699f0, rc=rc@entry=0) at src/http/v2/ngx_http_v2.c:3805
#1  0x000000000045411a in ngx_http_close_request (rc=rc@entry=0, r=<optimized out>) at src/http/ngx_http_request.c:3410
#2  0x0000000000454549 in ngx_http_set_lingering_close (r=<optimized out>) at src/http/ngx_http_request.c:3232
#3  ngx_http_finalize_connection (r=0x1c268c40) at src/http/ngx_http_request.c:2565
#4  0x0000000000453dc3 in ngx_http_request_handler (ev=<optimized out>) at src/http/ngx_http_request.c:2201
#5  0x000000000047ce2f in ngx_http_v2_write_handler (wev=<optimized out>) at src/http/v2/ngx_http_v2.c:446
#6  0x0000000000441ff1 in ngx_epoll_process_events (cycle=<optimized out>, timer=<optimized out>, flags=<optimized out>) at src/event/modules/ngx_epoll_module.c:848
#7  0x000000000043a9a3 in ngx_process_events_and_timers (cycle=cycle@entry=0x1328ea0) at src/event/ngx_event.c:258
#8  0x0000000000440169 in ngx_worker_process_cycle (cycle=cycle@entry=0x1328ea0, data=data@entry=0x5) at src/os/unix/ngx_process_cycle.c:765
#9  0x000000000043ebe5 in ngx_spawn_process (cycle=cycle@entry=0x1328ea0, proc=proc@entry=0x4400e0 <ngx_worker_process_cycle>, data=data@entry=0x5, 
    name=name@entry=0x52b179 "worker process", respawn=respawn@entry=-3) at src/os/unix/ngx_process.c:202
#10 0x00000000004404a4 in ngx_start_worker_processes (cycle=0x1328ea0, n=8, type=-3) at src/os/unix/ngx_process_cycle.c:366
#11 0x0000000000440d28 in ngx_master_process_cycle (cycle=0x1328ea0) at src/os/unix/ngx_process_cycle.c:138
#12 0x0000000000421475 in main (argc=<optimized out>, argv=<optimized out>) at src/core/nginx.c:367
(gdb) bt full
#0  ngx_http_v2_close_stream (stream=0x1c2699f0, rc=rc@entry=0) at src/http/v2/ngx_http_v2.c:3805
        pool = <optimized out>
        ev = 0x123d0bb8
        fc = 0x123d0a80
        node = <optimized out>
        h2c = 0x128ee8c0
#1  0x000000000045411a in ngx_http_close_request (rc=rc@entry=0, r=<optimized out>) at src/http/ngx_http_request.c:3410
        c = <optimized out>
#2  0x0000000000454549 in ngx_http_set_lingering_close (r=<optimized out>) at src/http/ngx_http_request.c:3232
        rev = <optimized out>
        wev = <optimized out>
        c = <optimized out>
        clcf = <optimized out>
#3  ngx_http_finalize_connection (r=0x1c268c40) at src/http/ngx_http_request.c:2565
        clcf = <optimized out>
        r = <optimized out>
#4  0x0000000000453dc3 in ngx_http_request_handler (ev=<optimized out>) at src/http/ngx_http_request.c:2201
        c = 0x123d0a80
        r = <optimized out>
#5  0x000000000047ce2f in ngx_http_v2_write_handler (wev=<optimized out>) at src/http/v2/ngx_http_v2.c:446
        rc = 0
        q = <optimized out>
        c = <optimized out>
        stream = <optimized out>
        h2c = 0x128ee8c0
#6  0x0000000000441ff1 in ngx_epoll_process_events (cycle=<optimized out>, timer=<optimized out>, flags=<optimized out>) at src/event/modules/ngx_epoll_module.c:848
        events = 1
        revents = <optimized out>
        instance = <optimized out>
        i = 0
        level = <optimized out>
        err = <optimized out>
        rev = <optimized out>
        wev = <optimized out>
        queue = <optimized out>
        c = 0x7fc503878708
#7  0x000000000043a9a3 in ngx_process_events_and_timers (cycle=cycle@entry=0x1328ea0) at src/event/ngx_event.c:258
        flags = <optimized out>
        timer = <optimized out>
        delta = 1458648320924
#8  0x0000000000440169 in ngx_worker_process_cycle (cycle=cycle@entry=0x1328ea0, data=data@entry=0x5) at src/os/unix/ngx_process_cycle.c:765
        worker = 5
#9  0x000000000043ebe5 in ngx_spawn_process (cycle=cycle@entry=0x1328ea0, proc=proc@entry=0x4400e0 <ngx_worker_process_cycle>, data=data@entry=0x5, 
    name=name@entry=0x52b179 "worker process", respawn=respawn@entry=-3) at src/os/unix/ngx_process.c:202
        on = 1
---Type <return> to continue, or q <return> to quit---q