 class IO8b7c:f320:99b9:690f:4595:cd17:293a:c069GAINWaitReadable 

Parent:
rb_eEAGAIN
Included modules:
IO8b7c:f320:99b9:690f:4595:cd17:293a:c069WaitReadable
  exception to wait for reading by EAGAIN. see IO.select.  

    Ruby Core © 1993–2022 Yukihiro MatsumotoLicensed under the Ruby License.Ruby Standard Library 
{'path': 'public/docs/ruby~3.1/io/eagainwaitreadable.html', 'source': 'DevDocs.IO'}