[tor-bugs] #19931 [Core Tor/Tor]: curve25519-donna runtime math errors on armhf

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#19931: curve25519-donna runtime math errors on armhf
-------------------------------------------------+-------------------------
 Reporter:  chadmiller                           |          Owner:
     Type:  defect                               |         Status:
                                                 |  needs_information
 Priority:  Medium                               |      Milestone:  Tor:
                                                 |  0.2.???
Component:  Core Tor/Tor                         |        Version:  Tor:
                                                 |  0.2.8.6
 Severity:  Normal                               |     Resolution:
 Keywords:  regression, integer-overflow,        |  Actual Points:
  029-proposed, 029-nickm-says-no                |
Parent ID:                                       |         Points:  0.5
 Reviewer:                                       |        Sponsor:
-------------------------------------------------+-------------------------

Comment (by chadmiller):

 cypherpunks, I verified compiler options do include -fwrapv .

 https://launchpadlibrarian.net/281589091
 /buildlog_snap_ubuntu_xenial_armhf_tor-middle-relay_BUILDING.txt.gz

 My TO-DO before marking "new" again: 1) Run tests to verify sanity. 2)
 find the compiler option that actually makes armhf gcc5 implement -fwrapv
 semantics without logging those warnings.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/19931#comment:8>
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