From 8d00da889d54148eb591e67337799f4d1814a032 Mon Sep 17 00:00:00 2001
From: "Kartik K. Agaram" <vc@akkartik.com>
Date: Tue, 5 Jul 2022 14:02:52 -0700
Subject: better error message

https://tildegit.org/akkartik/lines.love/issues/1
---
 file.lua | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/file.lua b/file.lua
index d3ccca2..92561bd 100644
--- a/file.lua
+++ b/file.lua
@@ -30,6 +30,9 @@ end
 
 function save_to_disk(lines, filename)
   local outfile = App.open_for_writing(filename)
+  if outfile == nil then
+    error('failed to write to "'..filename..'"')
+  end
   for _,line in ipairs(lines) do
     if line.mode == 'drawing' then
       store_drawing(outfile, line)
-- 
cgit 1.4.1-2-gfad0