[tahoe-lafs-trac-stream] [tahoe-lafs] #1418: "cannot convert float NaN to integer" in next_power_of_k, during upload via helper

[tahoe-lafs]

#1418: "cannot convert float NaN to integer" in next_power_of_k, during upload via
helper
-------------------------+-------------------------------------------------
     Reporter:  rycee    |      Owner:  zooko
         Type:  defect   |     Status:  assigned
     Priority:  major    |  Milestone:  undecided
    Component:  code     |    Version:  1.8.2
   Resolution:           |   Keywords:  helper upload heisenbug
Launchpad Bug:           |  floatingpoint
-------------------------+-------------------------------------------------

Comment (by rycee):

 Yeah, sorry about not being active on this bug. I've been happy with using
 my tahoe grid without helper so I haven't felt very motivated to dig
 around.

 zooko: The Linux bug you linked seem unrelated since the CPU on this
 computer is an old Pentium III-M, 1.2GHz and the bug was for newer,
 presumably 64-bit, CPUs.

 But I have interesting news, just tried downloading and building Tahoe
 1.9.1. When I ran `allmydata.test.test_cli.Backup.test_backup` it was
 successful! I thought it might be related to some glibc update or
 something so I also downloaded both 1.8.2 and 1.8.3, built them and ran
 the same test. They both failed in the same way as described in my
 previous comments. So, I assume that some change occurred between 1.8.3
 and 1.9.0 that must have fixed my problem.

 Just to double check that 1.9.1 actually fixes my problem I enabled the
 helper functionality and tried to upload through it, indeed it was
 successful.

-- 
Ticket URL: <https://tahoe-lafs.org/trac/tahoe-lafs/ticket/1418#comment:33>
tahoe-lafs <https://tahoe-lafs.org>
secure decentralized storage