From 4ebf23e7788022df378c502a822a09c9c457254d Mon Sep 17 00:00:00 2001
From: Tian Gao <gaogaotiantian@hotmail.com>
Date: Fri, 6 Oct 2023 17:14:00 -0700
Subject: [PATCH 1/3] Set convenience variable for post mortem debugging

---
 Lib/pdb.py           | 8 ++++++++
 Lib/test/test_pdb.py | 6 ++++++
 2 files changed, 14 insertions(+)

diff --git a/Lib/pdb.py b/Lib/pdb.py
index fd62d246f124ab..2cbd6f6746773f 100755
--- a/Lib/pdb.py
+++ b/Lib/pdb.py
@@ -304,6 +304,14 @@ def setup(self, f, tb):
         # cache it here to ensure that modifications are not overwritten.
         self.curframe_locals = self.curframe.f_locals
         self.set_convenience_variable(self.curframe, '_frame', self.curframe)
+
+        if self._chained_exceptions:
+            self.set_convenience_variable(
+                self.curframe,
+                '_exception',
+                self._chained_exceptions[self._chained_exception_index],
+            )
+
         return self.execRcLines()
 
     # Can be executed earlier than 'setup' if desired
diff --git a/Lib/test/test_pdb.py b/Lib/test/test_pdb.py
index 8fed1d0f7162fd..b1652e993b8a01 100644
--- a/Lib/test/test_pdb.py
+++ b/Lib/test/test_pdb.py
@@ -859,9 +859,11 @@ def test_post_mortem_chained():
     >>> with PdbTestInput([  # doctest: +ELLIPSIS, +NORMALIZE_WHITESPACE
     ...     'exceptions',
     ...     'exceptions 0',
+    ...     '$_exception',
     ...     'up',
     ...     'down',
     ...     'exceptions 1',
+    ...     '$_exception',
     ...     'up',
     ...     'down',
     ...     'exceptions -1',
@@ -882,6 +884,8 @@ def test_post_mortem_chained():
     (Pdb) exceptions 0
     > <doctest test.test_pdb.test_post_mortem_chained[0]>(3)test_function_2()
     -> 1/0
+    (Pdb) $_exception
+    ZeroDivisionError('division by zero')
     (Pdb) up
     > <doctest test.test_pdb.test_post_mortem_chained[1]>(3)test_function_reraise()
     -> test_function_2()
@@ -891,6 +895,8 @@ def test_post_mortem_chained():
     (Pdb) exceptions 1
     > <doctest test.test_pdb.test_post_mortem_chained[1]>(5)test_function_reraise()
     -> raise ZeroDivisionError('reraised') from e
+    (Pdb) $_exception
+    ZeroDivisionError('reraised')
     (Pdb) up
     > <doctest test.test_pdb.test_post_mortem_chained[2]>(5)test_function()
     -> test_function_reraise()

From 16f1c1872949d0f8ac2856281f1945a11822b606 Mon Sep 17 00:00:00 2001
From: "blurb-it[bot]" <43283697+blurb-it[bot]@users.noreply.github.com>
Date: Sat, 7 Oct 2023 00:18:41 +0000
Subject: [PATCH 2/3] =?UTF-8?q?=F0=9F=93=9C=F0=9F=A4=96=20Added=20by=20blu?=
 =?UTF-8?q?rb=5Fit.?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../next/Library/2023-10-07-00-18-40.gh-issue-106670.kCGyRc.rst  | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 Misc/NEWS.d/next/Library/2023-10-07-00-18-40.gh-issue-106670.kCGyRc.rst

diff --git a/Misc/NEWS.d/next/Library/2023-10-07-00-18-40.gh-issue-106670.kCGyRc.rst b/Misc/NEWS.d/next/Library/2023-10-07-00-18-40.gh-issue-106670.kCGyRc.rst
new file mode 100644
index 00000000000000..f2c348370534f7
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2023-10-07-00-18-40.gh-issue-106670.kCGyRc.rst
@@ -0,0 +1 @@
+Set convenience variable ``$_exception`` for post mortem debugging

From 0c9d9d2b669467d3d6ad1f350c15e76b6f88b61c Mon Sep 17 00:00:00 2001
From: Irit Katriel <1055913+iritkatriel@users.noreply.github.com>
Date: Mon, 9 Oct 2023 09:48:34 +0200
Subject: [PATCH 3/3] tweak news

---
 .../next/Library/2023-10-07-00-18-40.gh-issue-106670.kCGyRc.rst | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Misc/NEWS.d/next/Library/2023-10-07-00-18-40.gh-issue-106670.kCGyRc.rst b/Misc/NEWS.d/next/Library/2023-10-07-00-18-40.gh-issue-106670.kCGyRc.rst
index f2c348370534f7..3a066162b3dfdf 100644
--- a/Misc/NEWS.d/next/Library/2023-10-07-00-18-40.gh-issue-106670.kCGyRc.rst
+++ b/Misc/NEWS.d/next/Library/2023-10-07-00-18-40.gh-issue-106670.kCGyRc.rst
@@ -1 +1 @@
-Set convenience variable ``$_exception`` for post mortem debugging
+In :mod:`pdb`, set convenience variable ``$_exception`` for post mortem debugging.