d to wake up a closed selector
    wakes up if signaled to from another thread
  timeouts
    raises ArgumentError if given a negative timeout
    waits for a timeout when selecting
  backend
    knows its backend
  select
    selects IO objects
    iterates across selected objects with a block
    raises IOError if asked to select on a closed selector
    does not block on super small precision intervals
    selects closed IO objects
  register
    raises when asked to register after closing
    registers IO objects
    raises TypeError if asked to register non-IO objects
  .backends
    knows all supported backends
  #initialize
    raises ArgumentError if given an invalid backend
    allows explicitly specifying a backend
    raises TypeError if given a non-Symbol parameter
IO.pipe
  behaves like an NIO selectable
    selects writable objects
    selects readable objects
    does not select unreadable objects
    does not select unwritable objects
  behaves like an NIO selectable stream
    selects readable when the other end closes
Pending: (Failures listed here are expected and do not affect your suite's status)
  1) UDPSocket behaves like an NIO selectable does not select unwritable objects
     # come up with a UDPSocket that's blocked on writing
     Failure/Error: selector.register(unwritable_subject, :w)
     TypeError:
       no implicit conversion of false into IO
     Shared Example Group: "an NIO selectable" called from ./spec/nio/selectables/udp_socket_spec.rb:47
     # ./spec/support/selectable_examples.rb:36:in `initialize'
     # ./spec/support/selectable_examples.rb:36:in `register'
     # ./spec/support/selectable_examples.rb:36:in `block (2 levels) in <top (required)>'
Finished in 18.65 seconds (files took 9.24 seconds to load)
104 examples, 0 failures, 1 pending
Randomized with seed 9614
~/build/BUILD/nio4r-2.4.0
Processing files: rubygem-nio4r-2.4.0-2.fc31.riscv64
Provides: bundled(libev) = 4.25 rubygem(nio4r) = 2.4.0-1 rubygem-nio4r = 2.4.0-2.fc31 rubygem-nio4r(riscv-64) = 2.4.0-2.fc31
Requires(rpmlib): rpmlib(CompressedFileNames) <= 3.0.4-1 rpmlib(FileDigests) <= 4.6.0-1 rpmlib(PayloadFilesHavePrefix) <= 4.0-1
Requires: ld-linux-riscv64-lp64d.so.1()(64bit) ld-linux-riscv64-lp64d.so.1(GLIBC_2.27)(64bit) libc.so.6()(64bit) libc.so.6(GLIBC_2.27)(64bit) libruby.so.2.5()(64bit) rtld(GNU_HASH) ruby(rubygems)
Processing files: rubygem-nio4r-doc-2.4.0-2.fc31.noarch
Provides: rubygem-nio4r-doc = 2.4.0-2.fc31
Requires(rpmlib): rpmlib(CompressedFileNames) <= 3.0.4-1 rpmlib(FileDigests) <= 4.6.0-1 rpmlib(PayloadFilesHavePrefix) <= 4.0-1
Requires: /usr/bin/ruby
Processing files: rubygem-nio4r-debugsource-2.4.0-2.fc31.riscv64
Provides: rubygem-nio4r-debugsource = 2.4.0-2.fc31 rubygem-nio4r-debugsource(riscv-64) = 2.4.0-2.fc31
Requires(rpmlib): rpmlib(CompressedFileNames) <= 3.0.4-1 rpmlib(FileDigests) <= 4.6.0-1 rpmlib(PayloadFilesHavePrefix) <= 4.0-1
Processing files: rubygem-nio4r-debuginfo-2.4.0-2.fc31.riscv64
Provides: debuginfo(build-id) = e8543be36bde9e50d024a85455d40579a4506e9f rubygem-nio4r-debuginfo = 2.4.0-2.fc31 rubygem-nio4r-debuginfo(riscv-64) = 2.4.0-2.fc31
Requires(rpmlib): rpmlib(CompressedFileNames) <= 3.0.4-1 rpmlib(FileDigests) <= 4.6.0-1 rpmlib(PayloadFilesHavePrefix) <= 4.0-1
Recommends: rubygem-nio4r-debugsource(riscv-64) = 2.4.0-2.fc31
Checking for unpackaged file(s): /usr/lib/rpm/check-files /builddir/build/BUILDROOT/rubygem-nio4r-2.4.0-2.fc31.riscv64
Wrote: /builddir/build/RPMS/rubygem-nio4r-2.4.0-2.fc31.riscv64.rpm
Wrote: /builddir/build/RPMS/rubygem-nio4r-debugsource-2.4.0-2.fc31.riscv64.rpm
Wrote: /builddir/build/RPMS/rubygem-nio4r-debuginfo-2.4.0-2.fc31.riscv64.rpm
Wrote: /builddir/build/RPMS/rubygem-nio4r-doc-2.4.0-2.fc31.noarch.rpm
Executing(%clean): /bin/sh -e /var/tmp/rpm-tmp.jvPK2G
+ umask 022
+ cd /builddir/build/BUILD
+ cd nio4r-2.4.0
+ /usr/bin/rm -rf /builddir/build/BUILDROOT/rubygem-nio4r-2.4.0-2.fc31.riscv64
+ RPM_EC=0
BUILDSTDERR: ++ jobs -p
+ exit 0
Child return code was: 0