Bug#753582: adt-run dies when run on C locale

[Luca Falavigna]

Package: autopkgtest
Version: 3.0.2
Severity: important


Tried to run adt-run in a container (C locale), and received the
following traceback in return:

adt-run: @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ builds done.
adt-run: @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ tests ...
adt-run: @@@@@@@@@@@@@@@@@@@@ test dsc dsc0
adt-run [09:41:59]: test require: preparing
adt-run [09:42:00]: testbed dpkg architecture: amd64
OK
Ign file:  InRelease
Get:1 file:  Release.gpg [181 B]
Get:2 file:  Release [1202 B]
Hit http://ftp.us.debian.org unstable InRelease
Get:3 http://ftp.us.debian.org unstable/main Sources/DiffIndex [7876 B]
Hit http://ftp.us.debian.org unstable/main amd64 Packages/DiffIndex
Fetched 7876 B in 1s (4701 B/s)
Reading package lists...
adt-run [09:42:04]: ERROR: unexpected error:
Traceback (most recent call last):
  File "/usr/bin/adt-run", line 1907, in main
    process_actions()
  File "/usr/bin/adt-run", line 1883, in process_actions
    run_tests(act.tests, act.tests_tree)
  File "/usr/bin/adt-run", line 1322, in run_tests
    testbed.run_test(tree, t)
  File "/usr/bin/adt-run", line 1066, in run_test
    self.prepare(test.depends, 'needs-recommends' in test.restrictions)
  File "/usr/bin/adt-run", line 706, in prepare
    self.install_deps(deps_new, recommends)
  File "/usr/bin/adt-run", line 695, in install_deps
    binaries.publish()
  File "/usr/bin/adt-run", line 1533, in publish
    for l in open(aptkey_out.host):
  File "/usr/lib/python3.4/encodings/ascii.py", line 26, in decode
    return codecs.ascii_decode(input, self.errors)[0]
UnicodeDecodeError: 'ascii' codec can't decode byte 0xc2 in position
6757: ordinal not in range(128)