From 485a7dee9f8478f1f5bcef6896af02dc8d4969c6 Mon Sep 17 00:00:00 2001
From: Lukas Tobler <luk4s.tobler@gmail.com>
Date: Mon, 11 Sep 2017 11:12:05 +0200
Subject: Fix bug: crash when trying to comment empty lines

---
 vis-commentary.lua | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/vis-commentary.lua b/vis-commentary.lua
index b401a28..d8e38b9 100644
--- a/vis-commentary.lua
+++ b/vis-commentary.lua
@@ -49,6 +49,11 @@ local function get_lexer()
 end
 
 local function toggle_line_comment(lines, lnum, prefix, suffix)
+    if not lines or not lines[lnum] then return end
+
+    local stripped = lines[lnum]:match("^%s*(.+)") -- empty lines: nil
+    if not stripped then return end
+
     -- remove comment
     if lines[lnum]:match("^%s*(.+)"):sub(0, #prefix) == prefix then
         local match_str = "^(%s*)" .. esc(prefix) .. "%s?(.*)" .. esc(suffix)
-- 
cgit