Commits on Oct 3, 2024

1. ylib2to3/pgen2/grammar: Fix Grammar.dump for parallel use with Gramma… …

   …r.load
   
   Previously, bad timing could make another process run into reading a
   half-written pickle cache file, and thus fail like this:
   
   > Traceback (most recent call last):
   >   File "[..]/bin/yapf", line 5, in <module>
   >     from yapf import run_main
   >   File "[..]/lib/python3.11/site-packages/yapf/__init__.py", line 41, in <module>
   >     from yapf.yapflib import yapf_api
   >   File "[..]/lib/python3.11/site-packages/yapf/yapflib/yapf_api.py", line 38, in <module>
   >     from yapf.pyparser import pyparser
   >   File "[..]/lib/python3.11/site-packages/yapf/pyparser/pyparser.py", line 44, in <module>
   >     from yapf.yapflib import format_token
   >   File "[..]/lib/python3.11/site-packages/yapf/yapflib/format_token.py", line 23, in <module>
   >     from yapf.pytree import pytree_utils
   >   File "[..]/lib/python3.11/site-packages/yapf/pytree/pytree_utils.py", line 30, in <module>
   >     from yapf_third_party._ylib2to3 import pygram
   >   File "[..]/lib/python3.11/site-packages/yapf_third_party/_ylib2to3/pygram.py", line 29, in <module>
   >     python_grammar = driver.load_grammar(_GRAMMAR_FILE)
   >                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   >   File "[..]/lib/python3.11/site-packages/yapf_third_party/_ylib2to3/pgen2/driver.py", line 252, in load_grammar
   >     g.load(gp)
   >   File "[..]/lib/python3.11/site-packages/yapf_third_party/_ylib2to3/pgen2/grammar.py", line 95, in load
   >     d = pickle.load(f)
   >         ^^^^^^^^^^^^^^
   > EOFError: Ran out of input

   

   hartwork committed Oct 3, 2024
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