From a254660268d07ddaedc1ca2db2b5448a04a68c0c Mon Sep 17 00:00:00 2001
From: Florian Fischer <florian.fl.fischer@fau.de>
Date: Tue, 28 Apr 2020 10:06:26 +0200
Subject: make sure typos is always a string

vis:pipe apparently returns nil when the executed command does not
write to stdout.
fixes #1.
---
 spellcheck.lua | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'spellcheck.lua')

diff --git a/spellcheck.lua b/spellcheck.lua
index 54cffc4..e84e3db 100644
--- a/spellcheck.lua
+++ b/spellcheck.lua
@@ -24,7 +24,7 @@ spellcheck.enabled = {}
 
 local ignored = {}
 
-local last_viewport, last_typos = nil, nil
+local last_viewport, last_typos = nil, ""
 
 vis.events.subscribe(vis.events.WIN_HIGHLIGHT, function(win)
 	if not spellcheck.enabled[win] or not win:style_define(42, "fore:red") then
@@ -44,7 +44,7 @@ vis.events.subscribe(vis.events.WIN_HIGHLIGHT, function(win)
 			vis:message("calling " .. cmd .. " failed ("..se..")")
 			return false
 		end
-		typos = so
+		typos = so or ""
 	end
 
 	local corrections_iter = typos:gmatch("(.-)\n")
-- 
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