From a76b701db46154cf8c9a36873a38d52506f17859 2021-03-14 00:48:10
From: Matthias Bussonnier <bussonniermatthias@gmail.com>
Date: 2021-03-14 00:48:10
Subject: [PATCH] Merge pull request #12848 from meeseeksmachine/auto-backport-of-pr-12844-on-7.x

Backport PR #12844 on branch 7.x (Fix UnboundLocalError in IPDB when running 'context' command without argument)
---

diff --git a/IPython/core/debugger.py b/IPython/core/debugger.py
index 99c83f5..2bf0764 100644
--- a/IPython/core/debugger.py
+++ b/IPython/core/debugger.py
@@ -805,9 +805,9 @@ class Pdb(OldPdb):
             new_context = int(context)
             if new_context <= 0:
                 raise ValueError()
+            self.context = new_context
         except ValueError:
             self.error("The 'context' command requires a positive integer argument.")
-        self.context = new_context
 
 
 class InterruptiblePdb(Pdb):