Here's the backtrace from the deadlocked process.
(gdb) inf thr
11 Thread 0x2b06b3014940 (LWP 19795) 0x00000035b9a0d654 in __lll_lock_wait
() from /lib64/libpthread.so.0
10 Thread 0x2b06b3a15940 (LWP 19796) 0x00000035b86ce172 in select () from
/lib64/libc.so.6
9 Thread 0x2b06b4416940 (LWP 19797) 0x00000035b9a0b019 in
pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
8 Thread 0x2b06b4e17940 (LWP 19798) 0x00000035b9a0d654 in __lll_lock_wait ()
from /lib64/libpthread.so.0
7 Thread 0x2b06b5818940 (LWP 19799) 0x00000035b9a0b019 in
pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
6 Thread 0x2b06b6219940 (LWP 19800) 0x00000035b86cc0b6 in poll () from
/lib64/libc.so.6
5 Thread 0x2b06b6c1a940 (LWP 19801) 0x00000035b9a0b019 in
pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
4 Thread 0x2b06b761b940 (LWP 19802) 0x00000035b86ce172 in select () from
/lib64/libc.so.6
3 Thread 0x2b06b801c940 (LWP 19803) 0x00000035b86ce172 in select () from
/lib64/libc.so.6
2 Thread 0x2b06b8b42940 (LWP 19804) 0x00000035b9a0d654 in __lll_lock_wait ()
from /lib64/libpthread.so.0
* 1 Thread 0x2b06b1035f40 (LWP 19771) 0x00000035b9a0e9c8 in do_sigwait () from
/lib64/libpthread.so.0
warning: no loadable sections found in added symbol-file system-supplied DSO at
0x7fff6e1cf000
0x00000035b9a0e9c8 in do_sigwait () from /lib64/libpthread.so.0
(gdb) thr apply all bt
Thread 11 (Thread 0x2b06b3014940 (LWP 19795)):
#0 0x00000035b9a0d654 in __lll_lock_wait () from /lib64/libpthread.so.0
#1 0x00000035b9a10341 in _L_cond_lock_989 () from /lib64/libpthread.so.0
#2 0x00000035b9a1020f in __pthread_mutex_cond_lock () from
/lib64/libpthread.so.0
#3 0x00000035b9a0b0b4 in pthread_cond_wait@@GLIBC_2.3.2 () from
/lib64/libpthread.so.0
#4 0x00000000007b9937 in caml_condition_wait ()
#5 0x00000000006d0d82 in camlDtools__fun_3375 () at dtools.ml:830
#6 0x00000000006d0b8c in camlDtools__mutexify_2192 () at dtools.ml:797
#7 0x00000000006d0d13 in camlDtools__f_2208 () at dtools.ml:825
#8 0x0000000000728af9 in camlThread__fun_1570 () at thread.ml:39
#9 0x00000000007d7aae in caml_start_program ()
#10 0x00000000007ba694 in caml_thread_start ()
#11 0x00000035b9a0683d in start_thread () from /lib64/libpthread.so.0
#12 0x00000035b86d4fdd in clone () from /lib64/libc.so.6
Thread 10 (Thread 0x2b06b3a15940 (LWP 19796)):
#0 0x00000035b86ce172 in select () from /lib64/libc.so.6
#1 0x00000000007ba34d in caml_thread_tick ()
#2 0x00000035b9a0683d in start_thread () from /lib64/libpthread.so.0
#3 0x00000035b86d4fdd in clone () from /lib64/libc.so.6
Thread 9 (Thread 0x2b06b4416940 (LWP 19797)):
#0 0x00000035b9a0b019 in pthread_cond_wait@@GLIBC_2.3.2 () from
/lib64/libpthread.so.0
#1 0x00000000007b9937 in caml_condition_wait ()
#2 0x00000000006c69e5 in camlDuppy__run_1588 () at duppy.ml:344
#3 0x00000000006c6b8d in camlDuppy__f_1594 () at duppy.ml:350
#4 0x00000000006c6715 in camlDuppy__queue_inner_3418 () at duppy.ml:356
#5 0x000000000067b352 in camlTutils__queue_1717 () at tools/tutils.ml:212
#6 0x000000000067adf2 in camlTutils__fun_2698 () at tools/tutils.ml:136
#7 0x0000000000728af9 in camlThread__fun_1570 () at thread.ml:39
#8 0x00000000007d7aae in caml_start_program ()
#9 0x00000000007ba694 in caml_thread_start ()
#10 0x00000035b9a0683d in start_thread () from /lib64/libpthread.so.0
#11 0x00000035b86d4fdd in clone () from /lib64/libc.so.6
Thread 8 (Thread 0x2b06b4e17940 (LWP 19798)):
#0 0x00000035b9a0d654 in __lll_lock_wait () from /lib64/libpthread.so.0
#1 0x00000035b9a08f4a in _L_lock_1034 () from /lib64/libpthread.so.0
#2 0x00000035b9a08e0c in pthread_mutex_lock () from /lib64/libpthread.so.0
#3 0x00000000007baa4d in caml_mutex_lock ()
#4 0x00000000006d0b37 in camlDtools__mutexify_2192 () at dtools.ml:795
#5 0x0000000000548935 in camlLang_builtins__fun_6960 () at
lang/lang_builtins.ml:1809
#6 0x000000000064815e in camlLang_values__apply_2231 () at
lang/lang_values.ml:971
#7 0x0000000000647767 in camlLang_values__eval_2230 () at
lang/lang_values.ml:917
#8 0x000000000064815e in camlLang_values__apply_2231 () at
lang/lang_values.ml:971
#9 0x000000000064815e in camlLang_values__apply_2231 () at
lang/lang_values.ml:971
#10 0x000000000067a6cd in camlTutils__finalize_1361 () at tools/tutils.ml:85
#11 0x000000000064815e in camlLang_values__apply_2231 () at
lang/lang_values.ml:971
#12 0x0000000000647767 in camlLang_values__eval_2230 () at
lang/lang_values.ml:917
#13 0x000000000064815e in camlLang_values__apply_2231 () at
lang/lang_values.ml:971
#14 0x000000000067a6cd in camlTutils__finalize_1361 () at tools/tutils.ml:85
#15 0x0000000000547289 in camlLang_builtins__fun_6736 () at
lang/lang_builtins.ml:1481
---Type <return> to continue, or q <return> to quit---
#16 0x00000000006c582c in camlDuppy__fun_3287 () at duppy.ml:151
#17 0x00000000006c64c1 in camlDuppy__exec_1562 () at duppy.ml:279
#18 0x00000000006c6873 in camlDuppy__run_1588 () at duppy.ml:313
#19 0x00000000006c6b8d in camlDuppy__f_1594 () at duppy.ml:350
#20 0x00000000006c6715 in camlDuppy__queue_inner_3418 () at duppy.ml:356
#21 0x000000000067b352 in camlTutils__queue_1717 () at tools/tutils.ml:212
#22 0x000000000067adf2 in camlTutils__fun_2698 () at tools/tutils.ml:136
#23 0x0000000000728af9 in camlThread__fun_1570 () at thread.ml:39
#24 0x00000000007d7aae in caml_start_program ()
#25 0x00000000007ba694 in caml_thread_start ()
#26 0x00000035b9a0683d in start_thread () from /lib64/libpthread.so.0
#27 0x00000035b86d4fdd in clone () from /lib64/libc.so.6
Thread 7 (Thread 0x2b06b5818940 (LWP 19799)):
#0 0x00000035b9a0b019 in pthread_cond_wait@@GLIBC_2.3.2 () from
/lib64/libpthread.so.0
#1 0x00000000007b9937 in caml_condition_wait ()
#2 0x00000000006c69e5 in camlDuppy__run_1588 () at duppy.ml:344
#3 0x00000000006c6b8d in camlDuppy__f_1594 () at duppy.ml:350
#4 0x00000000006c6715 in camlDuppy__queue_inner_3418 () at duppy.ml:356
#5 0x000000000067b30f in camlTutils__queue_1717 () at tools/tutils.ml:214
#6 0x000000000067adf2 in camlTutils__fun_2698 () at tools/tutils.ml:136
#7 0x0000000000728af9 in camlThread__fun_1570 () at thread.ml:39
#8 0x00000000007d7aae in caml_start_program ()
#9 0x00000000007ba694 in caml_thread_start ()
#10 0x00000035b9a0683d in start_thread () from /lib64/libpthread.so.0
#11 0x00000035b86d4fdd in clone () from /lib64/libc.so.6
Thread 6 (Thread 0x2b06b6219940 (LWP 19800)):
#0 0x00000035b86cc0b6 in poll () from /lib64/libc.so.6
#1 0x00000000007b3e56 in caml_poll (_read=47307741856816, _write=13470432,
_err=13470432, _timeout=<value optimized out>) at duppy_stubs.c:95
#2 0x00000000006c4ec0 in camlDuppy__poll_1414 () at duppy.ml:32
#3 0x00000000006c60d4 in camlDuppy__f_1522 () at duppy.ml:207
#4 0x00000000006c5c14 in camlDuppy__process_1513 () at duppy.ml:227
#5 0x00000000006c6947 in camlDuppy__run_1588 () at duppy.ml:328
#6 0x00000000006c6b8d in camlDuppy__f_1594 () at duppy.ml:350
#7 0x00000000006c6715 in camlDuppy__queue_inner_3418 () at duppy.ml:356
#8 0x000000000067b30f in camlTutils__queue_1717 () at tools/tutils.ml:214
#9 0x000000000067adf2 in camlTutils__fun_2698 () at tools/tutils.ml:136
#10 0x0000000000728af9 in camlThread__fun_1570 () at thread.ml:39
#11 0x00000000007d7aae in caml_start_program ()
#12 0x00000000007ba694 in caml_thread_start ()
#13 0x00000035b9a0683d in start_thread () from /lib64/libpthread.so.0
#14 0x00000035b86d4fdd in clone () from /lib64/libc.so.6
Thread 5 (Thread 0x2b06b6c1a940 (LWP 19801)):
#0 0x00000035b9a0b019 in pthread_cond_wait@@GLIBC_2.3.2 () from
/lib64/libpthread.so.0
#1 0x00000000007b9937 in caml_condition_wait ()
#2 0x000000000067be0a in camlTutils__fun_2842 () at tools/tutils.ml:314
#3 0x000000000067a65c in camlTutils__mutexify_1350 () at tools/tutils.ml:80
#4 0x00000000006cfd29 in camlDtools__thread_1862 () at dtools.ml:556
#5 0x0000000000728af9 in camlThread__fun_1570 () at thread.ml:39
#6 0x00000000007d7aae in caml_start_program ()
#7 0x00000000007ba694 in caml_thread_start ()
---Type <return> to continue, or q <return> to quit---
#8 0x00000035b9a0683d in start_thread () from /lib64/libpthread.so.0
#9 0x00000035b86d4fdd in clone () from /lib64/libc.so.6
Thread 4 (Thread 0x2b06b761b940 (LWP 19802)):
#0 0x00000035b86ce172 in select () from /lib64/libc.so.6
#1 0x00000000007bdd48 in unix_select ()
#2 0x0000000000728bb8 in camlThread__delay_1290 () at thread.ml:75
#3 0x00000000006083eb in camlHttp_source__fun_4984 () at
sources/http_source.ml:544
#4 0x000000000067adf2 in camlTutils__fun_2698 () at tools/tutils.ml:136
#5 0x0000000000728af9 in camlThread__fun_1570 () at thread.ml:39
#6 0x00000000007d7aae in caml_start_program ()
#7 0x00000000007ba694 in caml_thread_start ()
#8 0x00000035b9a0683d in start_thread () from /lib64/libpthread.so.0
#9 0x00000035b86d4fdd in clone () from /lib64/libc.so.6
Thread 3 (Thread 0x2b06b801c940 (LWP 19803)):
#0 0x00000035b86ce172 in select () from /lib64/libc.so.6
#1 0x00000000007bdd48 in unix_select ()
#2 0x0000000000728bb8 in camlThread__delay_1290 () at thread.ml:75
#3 0x00000000006083eb in camlHttp_source__fun_4984 () at
sources/http_source.ml:544
#4 0x000000000067adf2 in camlTutils__fun_2698 () at tools/tutils.ml:136
#5 0x0000000000728af9 in camlThread__fun_1570 () at thread.ml:39
#6 0x00000000007d7aae in caml_start_program ()
#7 0x00000000007ba694 in caml_thread_start ()
#8 0x00000035b9a0683d in start_thread () from /lib64/libpthread.so.0
#9 0x00000035b86d4fdd in clone () from /lib64/libc.so.6
Thread 2 (Thread 0x2b06b8b42940 (LWP 19804)):
#0 0x00000035b9a0d654 in __lll_lock_wait () from /lib64/libpthread.so.0
#1 0x00000035b9a08f4a in _L_lock_1034 () from /lib64/libpthread.so.0
#2 0x00000035b9a08e0c in pthread_mutex_lock () from /lib64/libpthread.so.0
#3 0x00000000007baa4d in caml_mutex_lock ()
#4 0x00000000006d0b37 in camlDtools__mutexify_2192 () at dtools.ml:795
#5 0x00000000007d7aae in caml_start_program ()
#6 0x00000000007d5d52 in caml_final_do_calls () at finalise.c:201
#7 0x00000000007c4fec in caml_gc_dispatch () at minor_gc.c:443
#8 0x00000000007c2179 in caml_garbage_collection () at signals_asm.c:78
#9 0x00000000007d78cc in caml_call_gc ()
#10 0x0000000000744c62 in camlQueue__add_1219 () at queue.ml:49
#11 0x00000000006d0dda in camlDtools__fun_3380 () at dtools.ml:841
#12 0x00000000006d0b8c in camlDtools__mutexify_2192 () at dtools.ml:797
#13 0x000000000060f9ea in camlGenerated__fun_2098 () at sources/generated.ml:138
#14 0x000000000067a65c in camlTutils__mutexify_1350 () at tools/tutils.ml:80
#15 0x00000000006583ae in camlSource__fun_2730 () at source.ml:526
#16 0x00000000005c02c5 in camlAdd__fun_2433 () at operators/add.ml:126
#17 0x0000000000733758 in camlList__fold_left_1286 () at list.ml:96
#18 0x00000000005bf8f9 in camlAdd__fun_2392 () at operators/add.ml:109
#19 0x00000000006583ae in camlSource__fun_2730 () at source.ml:526
#20 0x00000000005bbe9b in camlCross__fun_2277 () at operators/cross.ml:203
#21 0x00000000006583ae in camlSource__fun_2730 () at source.ml:526
#23 0x00000000006583ae in camlSource__fun_2730 () at source.ml:526
#24 0x00000000005c59f3 in camlSwitch__fun_2619 () at operators/switch.ml:204
---Type <return> to continue, or q <return> to quit---
#25 0x00000000006583ae in camlSource__fun_2730 () at source.ml:526
#26 0x00000000005f1e3c in camlMean__fun_1669 () at conversions/mean.ml:59
#27 0x00000000006583ae in camlSource__fun_2730 () at source.ml:526
#28 0x00000000005ee078 in camlOutput__fun_2301 () at outputs/output.ml:174
#29 0x000000000065577c in camlClock__fun_2790 () at clock.ml:160
#30 0x0000000000733758 in camlList__fold_left_1286 () at list.ml:96
#31 0x0000000000653c51 in camlClock__fun_2743 () at clock.ml:158
#32 0x0000000000656bf1 in camlClock__loop_1981 () at clock.ml:374
#33 0x00000000006543ad in camlClock__fun_2987 () at clock.ml:377
#34 0x000000000067adf2 in camlTutils__fun_2698 () at tools/tutils.ml:136
#35 0x0000000000728af9 in camlThread__fun_1570 () at thread.ml:39
#36 0x00000000007d7aae in caml_start_program ()
#37 0x00000000007ba694 in caml_thread_start ()
#38 0x00000035b9a0683d in start_thread () from /lib64/libpthread.so.0
#39 0x00000035b86d4fdd in clone () from /lib64/libc.so.6
Thread 1 (Thread 0x2b06b1035f40 (LWP 19771)):
#0 0x00000035b9a0e9c8 in do_sigwait () from /lib64/libpthread.so.0
#1 0x00000035b9a0ea6d in sigwait () from /lib64/libpthread.so.0
#2 0x00000000007ba49c in caml_wait_signal ()
#3 0x00000000006cf9ec in camlDtools__wait_signal_1606 () at dtools.ml:527
#4 0x00000000006cfb36 in camlDtools__main_1857 () at dtools.ml:567
#5 0x00000000006cfe38 in camlDtools__catch_1869 () at dtools.ml:574
#6 0x0000000000539fb1 in camlMain__Make_1816 () at main.ml:658
#7 0x0000000000537630 in camlRunner__entry () at runner.ml:30
#8 0x000000000052eb59 in caml_program ()
#9 0x00000000007d7aae in caml_start_program ()
#10 0x00000000007c0cdc in caml_startup_exn (argv=0x7fff6e1a8498) at
startup.c:144
#11 0x00000000007c0cee in caml_startup (argv=0x7fff6e1a8180) at startup.c:149
#12 0x00000000007c0d14 in caml_main (argv=0x7fff6e1a8180) at startup.c:158
#13 0x00000000007c0d28 in main (argc=<value optimized out>, argv=0x0) at
main.c:37
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