New submission from Tim Peters <t...@python.org>:
Using Visual Studio 2017 to build the current master branch of Python
(something I'm trying for the first time in about two years - maybe I'm missing
something obvious!), with the x64 target, under both the Release and Debug
builds I get a Python that can't even start to run the test suite. Here's
output from the Release build - the Debug build output is nearly identical.
The problem does not appear with the Win32 target. Of course I'm doing this on
a 64-bit box (under Win 10 Pro):
C:\Code\Python\PCbuild>rt -q -x64
C:\Code\Python\PCbuild>"C:\Code\Python\PCbuild\amd64\python.exe" -u -Wd -E -bb
-m test
Traceback (most recent call last):
File "C:\Code\Python\lib\runpy.py", line 193, in _run_module_as_main
"__main__", mod_spec)
File "C:\Code\Python\lib\runpy.py", line 85, in _run_code
exec(code, run_globals)
File "C:\Code\Python\lib\test\__main__.py", line 1, in <module>
from test.libregrtest import main
File "C:\Code\Python\lib\test\libregrtest\__init__.py", line 4, in <module>
from test.libregrtest.cmdline import _parse_args, RESOURCE_NAMES,
ALL_RESOURCES
File "C:\Code\Python\lib\test\libregrtest\cmdline.py", line 4, in <module>
from test import support
File "C:\Code\Python\lib\test\support\__init__.py", line 6, in <module>
import asyncio.events
File "C:\Code\Python\lib\asyncio\__init__.py", line 8, in <module>
from .base_events import *
File "C:\Code\Python\lib\asyncio\base_events.py", line 39, in <module>
from . import events
File "C:\Code\Python\lib\asyncio\events.py", line 14, in <module>
import contextvars
File "C:\Code\Python\lib\contextvars.py", line 1, in <module>
from _contextvars import Context, ContextVar, Token, copy_context
ModuleNotFoundError: No module named '_contextvars'
_contextvarsmodule.c is in the list of Modules under the pythoncore project,
and it appears to compile without incident when the Solution is built.
The executable appears to be fine in other respects I checked; e.g.,
C:\Code\Python\PCbuild>amd64\python.exe
Python 3.8.0a0 (heads/master:24f6846920, Sep 14 2018, 18:55:33) [MSC v.1915 64
bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import math
>>> from collections import Counter
>>> Counter("abab")
Counter({'a': 2, 'b': 2})
>>> import _contextvars
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ModuleNotFoundError: No module named '_contextvars'
Clue?
----------
components: Build, Library (Lib), Windows
messages: 325419
nosy: paul.moore, steve.dower, tim.golden, tim.peters, zach.ware
priority: normal
severity: normal
status: open
title: _contextvars missing in x64 master branch Windows build?
type: behavior
versions: Python 3.8
_______________________________________
Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue34691>
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