diff options
Diffstat (limited to 'Doc')
| -rw-r--r-- | Doc/library/atexit.rst | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/Doc/library/atexit.rst b/Doc/library/atexit.rst index a2bd85b..3dbef69 100644 --- a/Doc/library/atexit.rst +++ b/Doc/library/atexit.rst @@ -48,6 +48,16 @@ a cleanup function is undefined. This function returns *func*, which makes it possible to use it as a decorator. + .. warning:: + Starting new threads or calling :func:`os.fork` from a registered + function can lead to race condition between the main Python + runtime thread freeing thread states while internal :mod:`threading` + routines or the new process try to use that state. This can lead to + crashes rather than clean shutdown. + + .. versionchanged:: 3.12 + Attempts to start a new thread or :func:`os.fork` a new process + in a registered function now leads to :exc:`RuntimeError`. .. function:: unregister(func) |