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#=== ERROR while compiling async-zmq.0.3.0 ====================================#
# context      2.0.0~rc | linux/x86_64 | ocaml-system.4.05.0 | file:///home/akochkov/data/tmp/opam-repository
# path         ~/.opam/default/.opam-switch/build/async-zmq.0.3.0
# command      ~/.opam/default/bin/omake
# exit-code    2
# env-file     ~/.opam/log/async-zmq-8146-bc27ca.env
# output-file  ~/.opam/log/async-zmq-8146-bc27ca.out
### output ###
# [...]
# *** omake: finished reading OMakefiles (0.03 sec)
# --- Checking if ocamldep understands -modules... (yes)
# - scan lib scan-ocaml-async_zmq.mli
# + ocamlfind ocamldep -package ZMQ,threads,core,async,sexplib,ppx_sexp_conv,ppx_deriving -modules async_zmq.mli
#      | Shell.ocamldep-postproc()
# File "async_zmq.mli", line 9, characters 24-31:
# Error: Cannot locate deriver sexp_of
# *** omake: 14/27 targets are up to date
# *** omake: failed (0.14 sec, 1/1 scans, 0/0 rules, 7/69 digests)
# *** omake: targets were not rebuilt because of errors:
#    <scanner lib/scan-ocaml-async_zmq.mli>
#       depends on: lib/async_zmq.mli



=-=- Error report -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
┌─ The following actions failed
│ λ  build async-zmq 0.3.0

Uncaught exception:

  ( "Error in Async.Fd_by_descr.add_exn: attempt to register a file descriptor with async\
   \nthat async believes it is already managing.  This likely indicates either:\
   \n\
   \n  * a bug in async\
   \n  * code outside of async manipulating a file descriptor that async is managing\
   \n"
   (((file_descr 8) (info <zmq>) (kind (Socket Bound))
     (supports_nonblock false) (have_set_nonblock false) (state (Open Empty))
     (watching ((read Not_watching) (write Not_watching)))
     (watching_has_changed false) (num_active_syscalls 0)
     (close_finished Empty))
    ((num_keys 8192)
     (alist
      ((8
        ((file_descr 8) (info <zmq>) (kind (Socket Bound))
         (supports_nonblock false) (have_set_nonblock false)
         (state (Open Empty))
         (watching ((read Not_watching) (write Not_watching)))
         (watching_has_changed false) (num_active_syscalls 0)
         (close_finished Empty)))
       (11
        ((file_descr 11) (info interruptor_pipe_write) (kind Fifo)
         (supports_nonblock true) (have_set_nonblock false)
         (state (Open Empty))
         (watching ((read Not_watching) (write Not_watching)))
         (watching_has_changed false) (num_active_syscalls 0)
         (close_finished Empty)))
       (10
        ((file_descr 10) (info interruptor_pipe_read) (kind Fifo)
         (supports_nonblock true) (have_set_nonblock false)
         (state (Open Empty))
         (watching ((read Not_watching) (write Not_watching)))
         (watching_has_changed false) (num_active_syscalls 0)
         (close_finished Empty))))))))

Raised at file "src/error.ml", line 7, characters 21-29
Called from file "src/raw_scheduler.ml", line 140, characters 2-38
Called from file "test.ml", line 11, characters 13-34
Called from file "test.ml", line 17, characters 2-9