From 7ed835cf137db0ca834826ec0f23d2867dabf88f Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Wed, 27 Dec 2017 06:35:09 +0530
Subject: [PATCH] Fix a crash when detecting URLs continued onto multiple lines

Fixes #244
---
 kitty/line.c             | 3 +--
 kitty_tests/datatypes.py | 3 +++
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/kitty/line.c b/kitty/line.c
index 1ac7b3c87..7402d449d 100644
--- a/kitty/line.c
+++ b/kitty/line.c
@@ -139,7 +139,7 @@ line_url_end_at(Line *self, index_type x, bool check_short) {
     index_type ans = x;
     if (x >= self->xnum || (check_short && self->xnum <= MIN_URL_LEN + 3)) return 0;
     while (ans < self->xnum && is_url_char(self->cells[ans].ch)) ans++;
-    ans--;
+    if (ans) ans--;
     while (ans > x && can_strip_from_end_of_url(self->cells[ans].ch)) ans--;
     return ans;
 }
@@ -618,4 +618,3 @@ copy_char(Line* self, PyObject *args) {
     COPY_CELL(self, src, to, dest);
     Py_RETURN_NONE;
 }
-
diff --git a/kitty_tests/datatypes.py b/kitty_tests/datatypes.py
index ddc244f70..37c251b82 100644
--- a/kitty_tests/datatypes.py
+++ b/kitty_tests/datatypes.py
@@ -269,6 +269,9 @@ class TestDataTypes(BaseTest):
         no_url('http: //acme.com')
         no_url('http:/ /acme.com')
 
+        l4 = create(' xxxxxtekljhgdkjgd')
+        self.ae(l4.url_end_at(0), 0)
+
     def rewrap(self, lb, lb2):
         hb = HistoryBuf(lb2.ynum, lb2.xnum)
         cy = lb.rewrap(lb2, hb)