tools/wpt/ tests failing on Python 3.6 and 3.8 on Windows #23441
Description
I've seen this from time to time, it's probably been happening for weeks or months already.
https://dev.azure.com/web-platform-tests/wpt/_build/results?buildId=47560&view=logs&jobId=b6659cb1-662e-592d-54c4-23e3f3bef39a&j=b6659cb1-662e-592d-54c4-23e3f3bef39a&t=10fc34cb-585f-5af5-e547-ad012e9553b8 (for #18830) shows this happening:
Generating script.
Script contents:
tox -c tools/wpt/ -e py36 -- --junitxml=results.xml
========================== Starting Command Output ===========================
"C:\windows\system32\cmd.exe" /D /E:ON /V:OFF /S /C "CALL "d:\a\_temp\0af6cff0-ee70-423f-b4f8-4ae2fa47f5ec.cmd""
py36 create: D:\a\1\s\tools\wpt\.tox\py36
ERROR: invocation failed (exit code 1), logfile: D:\a\1\s\tools\wpt\.tox\py36\log\py36-0.log
================================== log start ==================================
UnicodeDecodeError: 'ascii' codec can't decode byte 0xe4 in position 8: ordinal not in range(128)
=================================== log end ===================================
ERROR: InvocationError for command 'c:\hostedtoolcache\windows\python\2.7.18\x64\python.exe' -m virtualenv --no-download --python 'C:\hostedtoolcache\windows\Python\3.6.8\x64\python.exe' py36 (exited with code 1)
___________________________________ summary ___________________________________
ERROR: py36: InvocationError for command 'c:\hostedtoolcache\windows\python\2.7.18\x64\python.exe' -m virtualenv --no-download --python 'C:\hostedtoolcache\windows\Python\3.6.8\x64\python.exe' py36 (exited with code 1)
So things don't get very far at all before failing. This job has both python 2 and 3 installed, and possibly there's some mixup happening here.