Virtualenv causes AttributeError: 'module' object has no attribute 'openssl_md_meth_names'.

This is because _hashlib.so starting from Python 2.7.9 has this attribute, but doesn't before that.  The CrOS builder jail (cros_sdk) has Python 2.7.10 but the builders themselves have Python 2.7.3 (and my Goobuntu workstation has Python 2.7.6 for reference).

I don't have a reproduction yet, but I highly suspect the version mismatch to be the problem, with respect to the virtualenv.


Examples:

- https://chromium-review.googlesource.com/c/450872/2/cbuildbot/topology_unittest.py
- (need to find previous case of this happening)
 

Virtualenv causes AttributeError: 'module' object has no attribute 'openssl_md_meth_names'.

This is because _hashlib.so starting from Python 2.7.9 has this attribute, but doesn't before that.  The CrOS builder jail (cros_sdk) has Python 2.7.10 but the builders themselves have Python 2.7.3 (and my Goobuntu workstation has Python 2.7.6 for reference).

I don't have a reproduction yet, but I highly suspect the version mismatch to be the problem, with respect to the virtualenv.

Examples:

- https://chromium-review.googlesource.com/c/450872/2/cbuildbot/topology_unittest.py
- (need to find previous case of this happening)

Example traceback:

Traceback (most recent call last):
  File "lib/logdog_unittest", line 14, in <module>
    import wrapper
  File "/mnt/host/source/chromite/scripts/wrapper.py", line 76, in <module>
    from chromite.lib import commandline
  File "/mnt/host/source/chromite/lib/commandline.py", line 26, in <module>
    from chromite.lib import cros_build_lib
  File "/mnt/host/source/chromite/lib/cros_build_lib.py", line 12, in <module>
    import email.utils
  File "/usr/lib/python2.7/email/utils.py", line 27, in <module>
    import random
  File "/usr/lib/python2.7/random.py", line 49, in <module>
    import hashlib as _hashlib
  File "/usr/lib/python2.7/hashlib.py", line 138, in <module>
    _hashlib.openssl_md_meth_names)
AttributeError: 'module' object has no attribute 'openssl_md_meth_names'