call # Proc at core/proc.rb:20 (+248)
   { } in initialize # IO::Async::Private::IOLoop at /Users/cremes/dev/mygit/ruby-io/lib/io/async/private/io_loop.rb:30 (+1)
             io_loop # IO::Async::Private::IOLoop at /Users/cremes/dev/mygit/ruby-io/lib/io/async/private/io_loop.rb:56 (+75)
     flush_immediate # IO::Async::Private::IOLoop at /Users/cremes/dev/mygit/ruby-io/lib/io/async/private/io_loop.rb:141 (+5)
                poll # IO::Platforms::SelectPoller(IO::Platforms::ActivePoller) at
        /Users/cremes/dev/mygit/ruby-io/lib/io/platforms/common/select_poller.rb:48 (+130)
             copy_to # IO::Platforms::FDSetStruct at /Users/cremes/dev/mygit/ruby-io/lib/io/platforms/common/select.rb:40 (+100)
               times # Integer(Fixnum) at core/integer.rb:194 (+40)
      { } in copy_to # IO::Platforms::FDSetStruct at /Users/cremes/dev/mygit/ruby-io/lib/io/platforms/common/select.rb:41 (+8)
                  [] # FFI::Struct(IO::Platforms::FDSetStruct) at Struct.c (+-1)
                 get # FFI::StructLayout::Array at StructLayout.c (+-1)
                 new # Class at core/alpha.rb:93 (+16)

Data object has already been freed (ArgumentError)