From 1ad6a29546a92684f724ffdd1597476eb06998b8 2017-09-12 19:56:00
From: Matthias Bussonnier <bussonniermatthias@gmail.com>
Date: 2017-09-12 19:56:00
Subject: [PATCH] Avoid crashing if interrupt the kernel during completion.

This is likely due to completion taking too long, so just return what we
have so far, and ignore the interrupt.

closes #10733

---

diff --git a/IPython/core/completer.py b/IPython/core/completer.py
index 18905b1..ed44d98 100644
--- a/IPython/core/completer.py
+++ b/IPython/core/completer.py
@@ -1769,11 +1769,16 @@ class IPCompleter(Completer):
                       category=ProvisionalCompleterWarning, stacklevel=2)
 
         seen = set()
-        for c in self._completions(text, offset, _timeout=self.jedi_compute_type_timeout/1000):
-            if c and (c in seen):
-                continue
-            yield c
-            seen.add(c)
+        try:
+            for c in self._completions(text, offset, _timeout=self.jedi_compute_type_timeout/1000):
+                if c and (c in seen):
+                    continue
+                yield c
+                seen.add(c)
+        except KeyboardInterrupt:
+            """if completions take too long and users send keyboard interrupt,
+            do not crash and return ASAP. """
+            pass
 
     def _completions(self, full_text: str, offset: int, *, _timeout)->Iterator[Completion]:
         """