[Bug 1620754] Re: python-cryptography ftbfs for 3.5 on armhf with a bus error

[James Page]

[17328709.319625] python3[7312]: syscall 384
[17328709.319634] Code: 4607b4f0 46114608 e89c461a df000078 (f510bcf0) 
[17328709.319639] CPU: 0 PID: 7312 Comm: python3 Not tainted 3.13.0-77-generic #121-Ubuntu
[17328709.319643] task: ffffffc3a4c18b00 ti: ffffffc009398000 task.ti: ffffffc009398000
[17328709.319650] PC is at 0xf7631ea2
[17328709.319652] LR is at 0xdbd9b
[17328709.319654] pc : [<00000000f7631ea2>] lr : [<00000000000dbd9b>] pstate: 800c0030
[17328709.319656] sp : 00000000fffef410
[17328709.319658] x12: 00000000fffef420 
[17328709.319661] x11: 000000000030faa8 x10: 0000000000000cd4 
[17328709.319664] x9 : 0000000000000000 x8 : 00000000f77eb170 
[17328709.319667] x7 : 0000000000000180 x6 : 0000000000331008 
[17328709.319669] x5 : 0000000000331008 x4 : 0000000052a7a000 
[17328709.319672] x3 : 00000000fffef470 x2 : 0000000000000001 
[17328709.319674] x1 : 0000000000000018 x0 : 0000000000330ca0 

[17328709.909570] Unhandled fault: alignment fault (0x92000021) at
0x00000000f748947d

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https://bugs.launchpad.net/bugs/1620754

Title:
  python-cryptography ftbfs for 3.5 on armhf with a bus error

Status in python-cryptography package in Ubuntu:
  In Progress

Bug description:
  seen with
  https://launchpad.net/ubuntu/+source/python-cryptography/1.4-2/+build/10476934
  https://launchpad.net/ubuntu/+source/python-cryptography/1.5-1/+build/10678695

  the TestInvalidityDate.test_invalid_invalidity_date test is the first
  one to fail with a bus error. No reasonable traceback from gdb.

  Trying to build python3.5, python-cffi and python-cryptography with
  -mno-unaligned-access doesn't fix the issue (buildds running on a
  64bit kernel).

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