Thread 6 killed on uncaught exception Failure("CFRunLoop.Observer.Activity.of_ullong unknown code")

[samoht]

I just got that funny error, I am not sure what I've did wrong.

How to reproduce:

$ git clone https://github.com/samoht/irmin-watcher.git
$ git checkout broken
$ opam install osx-fsevents
$ opam install irmin-watcher --deps
$ make test
...
Thread 3 killed on uncaught exception Lwt_stream.Closed
...
Thread 6 killed on uncaught exception Failure("CFRunLoop.Observer.Activity.of_ullong unknown code")
...
[and then the test never seem to finish, but this is maybe an issue with the test itself]

[samoht]

With OCAMLRUNPARAM=b:

Thread 3 killed on uncaught exception Lwt_stream.Closed
Raised at file "src/preemptive/lwt_preemptive.ml", line 276, characters 25-28
Called from file "lib/fsevents_bindings.ml", line 309, characters 8-55
Called from file "src/ctypes-foreign-base/ctypes_ffi.ml", line 144, characters 16-83
Called from file "lwt/cf_lwt.ml", line 44, characters 6-12
...
Thread 6 killed on uncaught exception Failure("CFRunLoop.Observer.Activity.of_ullong unknown code")
Raised at file "pervasives.ml", line 32, characters 22-33
Called from file "src/ctypes/ctypes_memory.ml", line 36, characters 23-36
Called from file "src/ctypes-foreign-base/ctypes_ffi.ml", line 144, characters 38-83
Called from file "lwt/cf_lwt.ml", line 44, characters 6-12
Called from file "thread.ml", line 39, characters 8-14

[dsheets]

Could you please post the output of grep -A 10 "CFOptionFlags, CFRunLoopActivity" /System/Library/Frameworks/CoreFoundation.framework/Versions/A/Headers/CFRunLoop.h?

[samoht]

$ grep -A 10 "CFOptionFlags, CFRunLoopActivity" /System/Library/Frameworks/CoreFoundation.framework/Versions/A/Headers/CFRunLoop.h
grep: /System/Library/Frameworks/CoreFoundation.framework/Versions/A/Headers/CFRunLoop.h: No such file or directory
$ find /System/Library/Frameworks/CoreFoundation.framework/ -name CFRunLoop.h