nginx core dump workin live hls

[bianchilo]

Hi , I'm trying your module on a HLS live stream, sometime nginx crash with a core dump like this:

*** Error in `nginx: worker process': corrupted size vs. prev_size: 0x0000000001ebd240 ***
======= Backtrace: =========
/lib64/libc.so.6(+0x7f5d4)[0x7f7d5670c5d4]
/lib64/libc.so.6(+0x816cb)[0x7f7d5670e6cb]
/lib64/libavcodec.so.56(+0x689ef)[0x7f7d57fb09ef]
/lib64/libavcodec.so.56(av_parser_close+0x18)[0x7f7d5831dcb8]
/lib64/libavformat.so.56(+0x1338ff)[0x7f7d592d18ff]
/lib64/libavformat.so.56(+0x136ebd)[0x7f7d592d4ebd]
/lib64/libavformat.so.56(av_read_frame+0x2e3)[0x7f7d592d5413]
nginx: worker process[0x4bc6f5]
nginx: worker process(ngx_http_core_content_phase+0x1f)[0x450d7b]
nginx: worker process(ngx_http_core_run_phases+0x23)[0x44bf23]
nginx: worker process(ngx_http_handler+0xeb)[0x44c032]
nginx: worker process(ngx_http_process_request+0x1f8)[0x455f0d]
nginx: worker process[0x456263]
nginx: worker process[0x45653c]
nginx: worker process[0x4568d0]
nginx: worker process[0x441804]
nginx: worker process(ngx_process_events_and_timers+0x9c)[0x438c32]
nginx: worker process[0x43fbe4]
nginx: worker process(ngx_spawn_process+0x441)[0x43e322]
nginx: worker process[0x43eeab]
nginx: worker process(ngx_master_process_cycle+0x1f6)[0x4402e1]
nginx: worker process(main+0xb2f)[0x41b395]
/lib64/libc.so.6(__libc_start_main+0xf5)[0x7f7d566af3d5]
nginx: worker process[0x419b39]

2019/03/27 16:34:49 [alert] 6861#0: worker process 6862 exited on signal 6 (core dumped)

some suggestions ?

thanks in advance
l.