Martin Panter added the comment:
I occasionally get the following error, due to Parser/parsetok.o being older
than Include/graminit.h.
./python -E -S -m sysconfig --generate-posix-vars ; if test $? -ne 0 ; then
echo "generate-posix-vars failed" ; rm -f ./pybuilddir.txt ; exit 1 ; fi
Could not import runpy module
Traceback (most recent call last):
File "/home/proj/python/cpython/Lib/runpy.py", line 14, in <module>
import importlib.machinery # importlib first so we can test #15386 via -m
File "/home/proj/python/cpython/Lib/importlib/__init__.py", line 57, in
<module>
import types
File "/home/proj/python/cpython/Lib/types.py", line 166, in <module>
import functools as _functools
File "/home/proj/python/cpython/Lib/functools.py", line 345, in <module>
_CacheInfo = namedtuple("CacheInfo", ["hits", "misses", "maxsize",
"currsize"])
File "/home/proj/python/cpython/Lib/collections/__init__.py", line 428, in
namedtuple
exec(class_definition, namespace)
SystemError: invalid node 339 for PyAST_FromNode
generate-posix-vars failed
*** Error code 1
The best workaround for me (less brute force than removing the whole build
tree) seems to be to add Parser/parsetok.c to the list of files to “touch” the
timestamps of before building.
The dependency in Parser/parsetok.c on Include/graminit.h was added by
<https://hg.python.org/cpython/diff/06f1e2fd05bc/Parser/parsetok.c>, presumably
to support encoding declarations in Python source files. I haven’t tried, but
perhaps to avoid pgen depending on its output, a quick fix would be to add
#ifndef PGEN around the offending code. For Python 2, a Parser/parsetok_pgen.c
wrapper file would have to added, like in revision 6e9dc970ac0e.
----------
nosy: +martin.panter
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