SIGTERM is no longer caught to call sys.exitfunc.
This change was made long ago but the documentation was never updated.
diff --git a/Doc/lib/libsys.tex b/Doc/lib/libsys.tex
index 76b54a3..afb4008 100644
--- a/Doc/lib/libsys.tex
+++ b/Doc/lib/libsys.tex
@@ -122,9 +122,9 @@
This value is not actually defined by the module, but can be set by
the user (or by a program) to specify a clean-up action at program
exit. When set, it should be a parameterless function. This function
- will be called when the interpreter exits in any way (except when a
- fatal error occurs: in that case the interpreter's internal state
- cannot be trusted).
+ will be called when the interpreter exits. Note: the exit function
+ is not called when the program is killed by a signal, when a Python
+ fatal internal error is detected, or when \code{os._exit()} is called.
\end{datadesc}
\begin{funcdesc}{getrefcount}{object}