better error message

akkartik/lines.love#1
2022-07-05 14:02:52 -07:00 · 2022-07-05 14:02:52 -07:00 · 8d00da889d
parent 26a98d027b
commit 8d00da889d
1 changed files with 3 additions and 0 deletions
--- 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)