From f18ebefdd34f86a0c027ecb5323ec3805c8d0874 2023-08-10 21:45:21
From: krassowski <5832902+krassowski@users.noreply.github.com>
Date: 2023-08-10 21:45:21
Subject: [PATCH] Fix clearing output references

---

diff --git a/IPython/core/displayhook.py b/IPython/core/displayhook.py
index aba4f90..5b4ca6a 100644
--- a/IPython/core/displayhook.py
+++ b/IPython/core/displayhook.py
@@ -297,8 +297,11 @@ class DisplayHook(Configurable):
         for n in range(1,self.prompt_count + 1):
             key = '_'+repr(n)
             try:
+                del self.shell.user_ns_hidden[key]
+            except KeyError: pass
+            try:
                 del self.shell.user_ns[key]
-            except: pass
+            except KeyError: pass
         # In some embedded circumstances, the user_ns doesn't have the
         # '_oh' key set up.
         oh = self.shell.user_ns.get('_oh', None)