[Python-checkins] gh-96197: Define the behavior of breakpoint if sys.breakpointhook is lost (gh-96231)

[miss-islington]

https://github.com/python/cpython/commit/83ff85bc593fb34a2bd81fd00656d6dc0fee06fa
commit: 83ff85bc593fb34a2bd81fd00656d6dc0fee06fa
branch: 3.10
author: Miss Islington (bot) <31488909+miss-islington at users.noreply.github.com>
committer: miss-islington <31488909+miss-islington at users.noreply.github.com>
date: 2022-08-24T07:20:38-07:00
summary:

gh-96197: Define the behavior of breakpoint if sys.breakpointhook is lost (gh-96231)

(cherry picked from commit 09563a764ebc54f98087c128419f46cf0822b4b7)

Co-authored-by: Dong-hee Na <donghee.na at python.org>

files:
M Doc/library/functions.rst

diff --git a/Doc/library/functions.rst b/Doc/library/functions.rst
index d22cc2812dc..ba5d2cf8033 100644
--- a/Doc/library/functions.rst
+++ b/Doc/library/functions.rst
@@ -164,6 +164,8 @@ are always available.  They are listed here in alphabetical order.
    :func:`sys.breakpointhook` can be set to some other function and
    :func:`breakpoint` will automatically call that, allowing you to drop into
    the debugger of choice.
+   If :func:`sys.breakpointhook` is not available to be called, this function will
+   raise :exc:`RuntimeError`.
 
    .. audit-event:: builtins.breakpoint breakpointhook breakpoint