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

tahoe-lafs trac at tahoe-lafs.org
Tue Feb 28 16:37:38 UTC 2012


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

Comment (by zooko):

 There was a bug in the Linux kernel that would cause floating point state
 to be wrong "on 32-bit linux on modern CPUs":

 http://article.gmane.org/gmane.linux.kernel/1258780

 comment:16 says that rycee's machine was in 32-bit mode. rycee's
 [/attachment/ticket/1418/show-tool-versions-output.txt show-tool-versions
 output] says that the kernel was 2.6.32-5 (from Debian). I wasn't able to
 tell from the kernel patch comments when this bug was introduced into the
 kernel.

 Anyway, since rycee appears to have lost interest in debugging this, I
 suggest we close this ticket as unreproducible until rycee or someone else
 who can reproduce it reappears.

-- 
Ticket URL: <https://tahoe-lafs.org/trac/tahoe-lafs/ticket/1418#comment:31>
tahoe-lafs <https://tahoe-lafs.org>
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