SIGSEGV

[M0Rf30]

OS:
Arch Linux update to today
Liquidsoap: 1.3.4
this is the liq file

#!/usr/bin/liquidsoap
# Log dir
set("log.file.path","/tmp/basic-radio.log")

# Music
myplaylist = playlist(mode="random",timeout=40., "/home/radio/gmusic/gmusic-unsplitted.m3u")
# Some jingles
jingles = playlist("/home/radio/jingles/jingles.m3u")

# If the stream fails, we'll just play nothing...
security = blank(id="blank", duration=1.)
security = mksafe(security) # This is assured to be safe!

# Start building the feed with music
radio = myplaylist
# Now add some jingles
radio = random(weights = [1, 3],[jingles, radio])
# And finally the security
radio = fallback(track_sensitive = false, [radio, security])

# Stream it out
output.icecast(
  %fdkaac(channels=2, samplerate=44100, bitrate=96),
  host = "localhost", port = 8000,
  password = "password", mount = "/stream", radio)

and this is the gdb output:

Starting program: /usr/bin/liquidsoap /home/morfeo/zeroradio/assets/radio.liq -v
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/libthread_db.so.1".
2018/09/24 12:28:49 >>> LOG START
[New Thread 0x7fffe2053700 (LWP 25969)]
[New Thread 0x7fffe1852700 (LWP 25970)]
[New Thread 0x7fffe1051700 (LWP 25971)]
[New Thread 0x7fffe0850700 (LWP 25972)]
[New Thread 0x7fffe004f700 (LWP 25973)]
[New Thread 0x7fffdf84e700 (LWP 25974)]
[New Thread 0x7fffdf04d700 (LWP 25975)]
[New Thread 0x7fffde84c700 (LWP 25976)]
2018/09/24 12:28:49 [main:3] Liquidsoap 1.3.4
2018/09/24 12:28:49 [main:3] Using: bytes=[distributed with OCaml 4.02 or above] pcre=7.3.4 dtools=0.4.1 duppy=0.7.3 duppy.syntax=0.7.3 cry=0.6.2 mm=0.4.0 xmlplaylist=0.1.4 lastfm=0.3.2 ogg=0.5.2 vorbis=0.7.1 opus=0.1.2 speex=0.2.1 mad=0.4.5 flac=0.1.3 flac.ogg=0.1.3 dynlink=[distributed with Ocaml] lame=0.3.3 shine=0.2.1 gstreamer=0.3.0 fdkaac=0.2.1 theora=0.3.1 gavl=0.1.6 ffmpeg=0.2.0 bjack=0.1.5 alsa=0.2.3 ao=0.2.1 samplerate=0.1.4 taglib=0.3.4 ssl=0.5.6 magic=0.7.3 camomile=[unspecified] inotify=2.3 yojson=1.4.1 faad=0.4.0 soundtouch=0.1.8 pulseaudio=0.1.3 ladspa=0.1.5 dssi=0.1.2 sdl=0.9.1 lo=0.1.1 gd=1.0a5
2018/09/24 12:28:49 [gstreamer.loader:3] Loaded GStreamer 1.14.3 0
2018/09/24 12:28:49 [frame:3] Using 44100Hz audio, 25Hz video, 44100Hz master.
2018/09/24 12:28:49 [frame:3] Frame size must be a multiple of 1764 ticks = 1764 audio samples = 1 video samples.
2018/09/24 12:28:49 [frame:3] Targetting 'frame.duration': 0.04s = 1764 audio samples = 1764 ticks.
2018/09/24 12:28:49 [frame:3] Frames last 0.04s = 1764 audio samples = 1 video samples = 1764 ticks.
2018/09/24 12:28:49 [threads:3] Created thread "gstreamer_main_loop" (1 total).
2018/09/24 12:28:49 [threads:3] Created thread "generic queue #1".
2018/09/24 12:28:49 [threads:3] Created thread "generic queue #2".
2018/09/24 12:28:49 [threads:3] Created thread "non-blocking queue #1".
2018/09/24 12:28:49 [threads:3] Created thread "non-blocking queue #2".
2018/09/24 12:28:49 [jingles(dot)m3u:3] Loading playlist...
2018/09/24 12:28:49 [jingles(dot)m3u:3] No mime type specified, trying autodetection.
2018/09/24 12:28:49 [jingles(dot)m3u:3] Playlist treated as format application/x-mpegURL
2018/09/24 12:28:49 [jingles(dot)m3u:3] Successfully loaded a playlist of 32 tracks.
2018/09/24 12:28:49 [a(dot)m3u:3] Loading playlist...
2018/09/24 12:28:49 [a(dot)m3u:3] No mime type specified, trying autodetection.
2018/09/24 12:28:49 [a(dot)m3u:3] Playlist treated as format application/x-mpegURL
2018/09/24 12:28:49 [a(dot)m3u:3] Successfully loaded a playlist of 200 tracks.
2018/09/24 12:28:50 [/stream:3] Connecting mount /stream for source@localhost...
2018/09/24 12:28:50 [decoder:3] Method "FFMPEG" accepted "/home/morfeo/zeroradio/assets/jingles/saluti/saluto-nunzio.flac".
[New Thread 0x7fffddff2700 (LWP 25980)]
2018/09/24 12:28:50 [/stream:3] Connection setup was successful.
2018/09/24 12:28:50 [clock.wallclock_main:3] Streaming loop starts, synchronized with wallclock.
2018/09/24 12:28:50 [threads:3] Created thread "wallclock_main" (2 total).
2018/09/24 12:28:50 [fallback_8080:3] Switch to mksafe.
2018/09/24 12:28:50 [mksafe:3] Switch to blank.
2018/09/24 12:28:50 [jingles(dot)m3u:3] Prepared "/home/morfeo/zeroradio/assets/jingles/saluti/saluto-nunzio.flac" (RID 2).
2018/09/24 12:28:50 [fallback_8080:3] Switch to random_8078 with transition.
2018/09/24 12:28:50 [random_8078:3] Switch to jingles(dot)m3u.
2018/09/24 12:28:50 [decoder:3] Method "FFMPEG" accepted "/home/morfeo/zeroradio/assets/jingles/saluti/saluto-nick.flac".
[Detaching after fork from child process 25983]
2018/09/24 12:28:57 [jingles(dot)m3u:3] Finished with "/home/morfeo/zeroradio/assets/jingles/saluti/saluto-nunzio.flac".
2018/09/24 12:28:58 [jingles(dot)m3u:3] Prepared "/home/morfeo/zeroradio/assets/jingles/saluti/saluto-nick.flac" (RID 4).

Thread 8 "liquidsoap" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fffdf04d700 (LWP 25975)]
0x0000555555c2962d in caml_c_call ()

thanks for any suggestion. I'll remain available for any debugging purpose

[toots]

Thanks for the report. Would mind sending the full backtrace? You can get it by doing:

thread apply all bt

[M0Rf30]

after the previous command i've run the one that you suggest

Thread 10 (Thread 0x7fffddff2700 (LWP 5278)):
#0  0x00007ffff5f2b850 in nanosleep () at /usr/lib/libpthread.so.0
#1  0x0000555555c0966d in unix_sleep ()
#2  0x0000555555a373c4 in camlClock__usleep_702259 ()
#3  0x0000555555a37920 in camlClock__loop_702568 ()
#4  0x0000555555a3512d in camlClock__fun_1003514 ()
#5  0x0000555555a5e602 in camlTutils__fun_1002761 ()
#6  0x0000555555b4f139 in camlThread__fun_2005 ()
#7  0x0000555555c296ac in caml_start_program ()
#8  0x0000555555c04040 in  ()
#9  0x00007ffff5f21a9d in start_thread () at /usr/lib/libpthread.so.0
#10 0x00007ffff195aa43 in clone () at /usr/lib/libc.so.6

Thread 9 (Thread 0x7fffde84c700 (LWP 5274)):
#0  0x00007ffff5f27afc in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x0000555555c04dc4 in caml_condition_wait ()
#2  0x0000555555a5f6aa in camlTutils__fun_1002905 ()
#3  0x0000555555a5de3c in camlTutils__mutexify_1007 ()
#4  0x0000555555b3ee59 in camlDtools__thread_402530 ()
#5  0x0000555555b4f139 in camlThread__fun_2005 ()
#6  0x0000555555c296ac in caml_start_program ()
#7  0x0000555555c04040 in  ()
#8  0x00007ffff5f21a9d in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007ffff195aa43 in clone () at /usr/lib/libc.so.6

Thread 8 (Thread 0x7fffdf04d700 (LWP 5273)):
#0  0x00007ffff5f27afc in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
--Type <RET> for more, q to quit, c to continue without paging--
#1  0x0000555555c04dc4 in caml_condition_wait ()
#2  0x0000555555b35445 in camlDuppy__run_201580 ()
#3  0x0000555555b35615 in camlDuppy__f_301586 ()
#4  0x0000555555b35626 in camlDuppy__f_301586 ()
#5  0x0000555555b35626 in camlDuppy__f_301586 ()
#6  0x0000555555b35626 in camlDuppy__f_301586 ()
#7  0x0000555555b35626 in camlDuppy__f_301586 ()
#8  0x0000555555b35626 in camlDuppy__f_301586 ()
#9  0x0000555555a5ebaf in camlTutils__queue_302341 ()
#10 0x0000555555a5e602 in camlTutils__fun_1002761 ()
#11 0x0000555555b4f139 in camlThread__fun_2005 ()
#12 0x0000555555c296ac in caml_start_program ()
#13 0x0000555555c04040 in  ()
#14 0x00007ffff5f21a9d in start_thread () at /usr/lib/libpthread.so.0
#15 0x00007ffff195aa43 in clone () at /usr/lib/libc.so.6

Thread 7 (Thread 0x7fffdf84e700 (LWP 5272)):
#0  0x0000555555c2962d in caml_c_call ()
#1  0x0000000000000000 in  ()

Thread 6 (Thread 0x7fffe004f700 (LWP 5271)):
#0  0x00007ffff5f27afc in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x0000555555c04dc4 in caml_condition_wait ()
#2  0x0000555555b35445 in camlDuppy__run_201580 ()
#3  0x0000555555b35615 in camlDuppy__f_301586 ()
#4  0x0000555555b35626 in camlDuppy__f_301586 ()
#5  0x0000555555b35626 in camlDuppy__f_301586 ()
#6  0x0000555555a5ebf2 in camlTutils__queue_302341 ()
--Type <RET> for more, q to quit, c to continue without paging--
#7  0x0000555555a5e602 in camlTutils__fun_1002761 ()
#8  0x0000555555b4f139 in camlThread__fun_2005 ()
#9  0x0000555555c296ac in caml_start_program ()
#10 0x0000555555c04040 in  ()
#11 0x00007ffff5f21a9d in start_thread () at /usr/lib/libpthread.so.0
#12 0x00007ffff195aa43 in clone () at /usr/lib/libc.so.6

Thread 5 (Thread 0x7fffe0850700 (LWP 5270)):
#0  0x00007ffff19523af in select () at /usr/lib/libc.so.6
#1  0x0000555555c08c59 in unix_select ()
#2  0x0000555555a5f956 in camlTutils__wait_702402 ()
#3  0x000055555592a52d in camlLang_builtins__fun_706806 ()
#4  0x0000555555a5dead in camlTutils__finalize_1018 ()
#5  0x0000555555929cc4 in camlLang_builtins__fun_706710 ()
#6  0x0000555555a26692 in camlLang_values__apply_1102702 ()
#7  0x0000555555a25c08 in camlLang_values__eval_1102701 ()
#8  0x0000555555a26692 in camlLang_values__apply_1102702 ()
#9  0x0000555555a26692 in camlLang_values__apply_1102702 ()
#10 0x0000555555a5dead in camlTutils__finalize_1018 ()
#11 0x0000555555a26692 in camlLang_values__apply_1102702 ()
#12 0x0000555555a26692 in camlLang_values__apply_1102702 ()
#13 0x0000555555a5dead in camlTutils__finalize_1018 ()
#14 0x0000555555925293 in camlLang_builtins__fun_706225 ()
#15 0x0000555555a431ce in camlRequest__resolve_step_202897 ()
#16 0x0000555555a42f47 in camlRequest__resolve_202893 ()
#17 0x00005555559f661d in camlRequest_source__fun_603288 ()
#18 0x00005555559f69ff in camlRequest_source__fun_603275 ()
#19 0x0000555555b3591c in camlDuppy__task_402234 ()
--Type <RET> for more, q to quit, c to continue without paging--
#20 0x0000555555b342cc in camlDuppy__fun_803625 ()
#21 0x0000555555b34f61 in camlDuppy__exec_201554 ()
#22 0x0000555555b352d3 in camlDuppy__run_201580 ()
#23 0x0000555555b35615 in camlDuppy__f_301586 ()
#24 0x0000555555b35626 in camlDuppy__f_301586 ()
#25 0x0000555555b35626 in camlDuppy__f_301586 ()
#26 0x0000555555b35626 in camlDuppy__f_301586 ()
#27 0x0000555555b35626 in camlDuppy__f_301586 ()
#28 0x0000555555b35626 in camlDuppy__f_301586 ()
#29 0x0000555555a5ebf2 in camlTutils__queue_302341 ()
#30 0x0000555555a5e602 in camlTutils__fun_1002761 ()
#31 0x0000555555b4f139 in camlThread__fun_2005 ()
#32 0x0000555555c296ac in caml_start_program ()
#33 0x0000555555c04040 in  ()
#34 0x00007ffff5f21a9d in start_thread () at /usr/lib/libpthread.so.0
#35 0x00007ffff195aa43 in clone () at /usr/lib/libc.so.6

Thread 4 (Thread 0x7fffe1051700 (LWP 5269)):
#0  0x00007ffff194fbb1 in poll () at /usr/lib/libc.so.6
#1  0x00007ffff32ffee0 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007ffff3300f62 in g_main_loop_run () at /usr/lib/libglib-2.0.so.0
#3  0x0000555555bda253 in ocaml_gstreamer_loop_run ()
#4  0x0000555555a46b74 in camlGstreamer_utils__main_101720 ()
#5  0x0000555555a5e602 in camlTutils__fun_1002761 ()
#6  0x0000555555b4f139 in camlThread__fun_2005 ()
#7  0x0000555555c296ac in caml_start_program ()
#8  0x0000555555c04040 in  ()
#9  0x00007ffff5f21a9d in start_thread () at /usr/lib/libpthread.so.0
--Type <RET> for more, q to quit, c to continue without paging--
#10 0x00007ffff195aa43 in clone () at /usr/lib/libc.so.6

Thread 3 (Thread 0x7fffe1852700 (LWP 5268)):
#0  0x00007ffff19523af in select () at /usr/lib/libc.so.6
#1  0x0000555555c03ba9 in  ()
#2  0x00007ffff5f21a9d in start_thread () at /usr/lib/libpthread.so.0
#3  0x00007ffff195aa43 in clone () at /usr/lib/libc.so.6

Thread 2 (Thread 0x7fffe2053700 (LWP 5267)):
#0  0x00007ffff5f27afc in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x0000555555c04dc4 in caml_condition_wait ()
#2  0x0000555555b3feb2 in camlDtools__fun_1503973 ()
#3  0x0000555555b3fcbc in camlDtools__mutexify_702897 ()
#4  0x0000555555b3fe43 in camlDtools__f_802917 ()
#5  0x0000555555b4f139 in camlThread__fun_2005 ()
#6  0x0000555555c296ac in caml_start_program ()
#7  0x0000555555c04040 in  ()
#8  0x00007ffff5f21a9d in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007ffff195aa43 in clone () at /usr/lib/libc.so.6

Thread 1 (Thread 0x7fffe5010ac0 (LWP 5263)):
#0  0x00007ffff1897b4c in sigtimedwait () at /usr/lib/libc.so.6
#1  0x00007ffff5f2bf4d in sigwait () at /usr/lib/libpthread.so.0
#2  0x0000555555c0443a in caml_wait_signal ()
#3  0x0000555555b3eb20 in camlDtools__wait_signal_302274 ()
#4  0x0000555555b3ec66 in camlDtools__main_402525 ()
#5  0x0000555555b3ef68 in camlDtools__catch_402537 ()
#6  0x000055555591aff9 in camlMain__Make_302198 ()
--Type <RET> for more, q to quit, c to continue without paging--
#7  0x0000555555918610 in camlRunner__entry ()
#8  0x00005555559101f9 in caml_program ()
#9  0x0000555555c296ac in caml_start_program ()
#10 0x0000555555c0c255 in caml_startup_common ()
#11 0x0000555555c0c29b in caml_startup ()
#12 0x000055555590e6bc in main ()

[toots]

Hi. Any chance you could try with the latest ocaml-duppy code? Via opam, you can do:

git clone --recursive https://github.com/savonet/ocaml-duppy.git
cd ocaml-duppy
opam pin add .

[M0Rf30]

Yes. It seems fixed. Thank you so much. Now the SIGSEGV disappeared, but show this message

2018/11/11 15:34:55 [/stream:3] Will try again in 3.00 sec.
2018/11/11 15:34:59 [/stream:3] Connecting mount /stream for source@localhost...
2018/11/11 15:34:59 [/stream:2] Connection failed: could not connect to host: Connection refused in connect()
strange error flushing buffer ... 
strange error flushing buffer ...

and it happens when it doesn't find icecast turned on

[toots]

Not sure about the icecast issue, you might want to double check your install/config.

Glad to hear the bug is fixed. Hopefully that's also the case with the one from @gilou.