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gh-100228: Warn from os.fork() if other threads exist. (#100229)

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Not comprehensive, best effort warning. There are cases when threads exist on some platforms that this code cannot detect. macOS when API permissions allow and Linux with a readable /proc procfs present are the currently supported cases where a warning should show up reliably.

Starting with a DeprecationWarning for now, it is less disruptive than something like RuntimeWarning and most likely to only be seen in people's CI tests - a good place to start with this messaging.
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Gregory P. Smith 2022-12-29 14:41:39 -08:00 • committed by GitHub
parent 2df82db485
commit 894f2c3c16
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12 changed files with 283 additions and 66 deletions
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Include/internal/pycore_global_strings.h
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@ -219,6 +219,7 @@ struct _Py_global_strings {
STRUCT_FOR_ID(__xor__)
STRUCT_FOR_ID(_abc_impl)
STRUCT_FOR_ID(_abstract_)
STRUCT_FOR_ID(_active)
STRUCT_FOR_ID(_annotation)
STRUCT_FOR_ID(_anonymous_)
STRUCT_FOR_ID(_argtypes_)
@ -239,6 +240,7 @@ struct _Py_global_strings {
STRUCT_FOR_ID(_initializing)
STRUCT_FOR_ID(_is_text_encoding)
STRUCT_FOR_ID(_length_)
STRUCT_FOR_ID(_limbo)
STRUCT_FOR_ID(_lock_unlock_module)
STRUCT_FOR_ID(_loop)
STRUCT_FOR_ID(_needs_com_addref_)