From 699fdb409758f64763e77a5632256e73f617c459 2011-12-18 01:37:59
From: Fernando Perez <Fernando.Perez@berkeley.edu>
Date: 2011-12-18 01:37:59
Subject: [PATCH] Clear inputhook after printing exception information.

Makes this codepath more robust against KeyboardInterrupt raised
during exception printing in Qt4 inputhook.

Credit goes to @cboos for spotting this.

---

diff --git a/IPython/lib/inputhookqt4.py b/IPython/lib/inputhookqt4.py
index 71c6df6..a8dc349 100644
--- a/IPython/lib/inputhookqt4.py
+++ b/IPython/lib/inputhookqt4.py
@@ -98,10 +98,10 @@ def create_inputhook_qt4(mgr, app=None):
             mgr.clear_inputhook()
         except: # NO exceptions are allowed to escape from a ctypes callback
             ignore_CTRL_C()
-            mgr.clear_inputhook()
             from traceback import print_exc
             print_exc()
             print("Got exception from inputhook_qt4, unregistering.")
+            mgr.clear_inputhook()
         finally:
             allow_CTRL_C()
         return 0