bpo-32146: Add documentation about frozen executables on Unix (GH-5850)
diff --git a/Doc/library/multiprocessing.rst b/Doc/library/multiprocessing.rst
index 1d0920a..a778159 100644
--- a/Doc/library/multiprocessing.rst
+++ b/Doc/library/multiprocessing.rst
@@ -186,6 +186,13 @@
use :func:`get_context` to avoid interfering with the choice of the
library user.
+.. warning::
+
+ The ``'spawn'`` and ``'forkserver'`` start methods cannot currently
+ be used with "frozen" executables (i.e., binaries produced by
+ packages like **PyInstaller** and **cx_Freeze**) on Unix.
+ The ``'fork'`` start method does work.
+
Exchanging objects between processes
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
diff --git a/Misc/NEWS.d/next/Library/2018-02-25-10-17-23.bpo-32146.xOzUFW.rst b/Misc/NEWS.d/next/Library/2018-02-25-10-17-23.bpo-32146.xOzUFW.rst
new file mode 100644
index 0000000..f071c71
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2018-02-25-10-17-23.bpo-32146.xOzUFW.rst
@@ -0,0 +1,2 @@
+Document the interaction between frozen executables and the spawn and
+forkserver start methods in multiprocessing.