From dfe98d10534cea30eccb97fa4bba13d01aba709b Mon Sep 17 00:00:00 2001
From: Florian Bruhin <git@the-compiler.org>
Date: Tue, 16 Jun 2015 13:22:55 +0200
Subject: [PATCH] completion: Fix initial _cursor_part value.

Fixes #749.
---
 qutebrowser/completion/completer.py | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/qutebrowser/completion/completer.py b/qutebrowser/completion/completer.py
index 197c62ce1..ebcaed67d 100644
--- a/qutebrowser/completion/completer.py
+++ b/qutebrowser/completion/completer.py
@@ -328,7 +328,7 @@ class Completer(QObject):
                         cursor_pos))
         skip = 0
         for i, part in enumerate(parts):
-            log.completion.vdebug("Checking part {}: {}".format(i, parts[i]))
+            log.completion.vdebug("Checking part {}: {!r}".format(i, parts[i]))
             if not part:
                 skip += 1
                 continue
@@ -350,7 +350,11 @@ class Completer(QObject):
                 "Removing len({!r}) -> {} from cursor_pos -> {}".format(
                     part, len(part), cursor_pos))
         else:
-            self._cursor_part = i - skip
+            if i == 0:
+                # Initial `:` press without any text.
+                self._cursor_part = 0
+            else:
+                self._cursor_part = i - skip
             if spaces:
                 self._empty_item_idx = i - skip
             else: