From ff93866969e140eaa68ea5bde4b763e74386ee31 2023-10-02 08:11:21
From: Matthias Bussonnier <bussonniermatthias@gmail.com>
Date: 2023-10-02 08:11:21
Subject: [PATCH] Backport PR #14198 on branch 8.16.x (Revert "fix semicolon detection with no history") (#14199)

Backport PR #14198: Revert "fix semicolon detection with no history"
---

diff --git a/IPython/core/displayhook.py b/IPython/core/displayhook.py
index 1ea8d85..b411f11 100644
--- a/IPython/core/displayhook.py
+++ b/IPython/core/displayhook.py
@@ -51,7 +51,7 @@ class DisplayHook(Configurable):
 
         # we need a reference to the user-level namespace
         self.shell = shell
-
+        
         self._,self.__,self.___ = '','',''
 
         # these are deliberately global:
@@ -83,9 +83,15 @@ class DisplayHook(Configurable):
 
     def quiet(self):
         """Should we silence the display hook because of ';'?"""
-        if self.exec_result is not None:
-            return self.semicolon_at_end_of_expression(self.exec_result.info.raw_cell)
-        return False
+        # do not print output if input ends in ';'
+        
+        try:
+            cell = self.shell.history_manager.input_hist_parsed[-1]
+        except IndexError:
+            # some uses of ipshellembed may fail here
+            return False
+        
+        return self.semicolon_at_end_of_expression(cell)
 
     @staticmethod
     def semicolon_at_end_of_expression(expression):
@@ -274,12 +280,13 @@ class DisplayHook(Configurable):
         cull_count = max(int(sz * self.cull_fraction), 2)
         warn('Output cache limit (currently {sz} entries) hit.\n'
              'Flushing oldest {cull_count} entries.'.format(sz=sz, cull_count=cull_count))
-
+        
         for i, n in enumerate(sorted(oh)):
             if i >= cull_count:
                 break
             self.shell.user_ns.pop('_%i' % n, None)
             oh.pop(n, None)
+        
 
     def flush(self):
         if not self.do_full_cache: