[issue41185] lib2to3 generation of pickle files is racy

Change by Irit Katriel : -- resolution: -> wont fix stage: -> resolved status: open -> closed superseder: -> Close 2to3 issues and list them here ___ Python tracker ___

[issue41185] lib2to3 generation of pickle files is racy

New submission from Marco Barisione : The generation of pickle files in load_grammar in lib2to3/pgen2/driver.py is racy as other processes may end up reading a half-written pickle file. This is reproducible with the command line tool, but it's easier to reproduce by importing lib2to3. You jus