Issue #15646: Prevent equivalent of a fork bomb when using multiprocessing
on Windows without the "if __name__ == '__main__'" idiom.
diff --git a/Lib/multiprocessing/forking.py b/Lib/multiprocessing/forking.py
index 3fca8b1..55980ff 100644
--- a/Lib/multiprocessing/forking.py
+++ b/Lib/multiprocessing/forking.py
@@ -336,7 +336,7 @@
'''
Returns prefix of command line used for spawning a child process
'''
- if process.current_process()._identity==() and is_forking(sys.argv):
+ if getattr(process.current_process(), '_inheriting', False):
raise RuntimeError('''
Attempt to start a new process before the current process
has finished its bootstrapping phase.