return early if no file is opened

Reported-By: Matěj Cepl <mcepl@cepl.eu>
Tested-By: Alin Mr <almr.oss@outlook.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/init.lua b/init.lua
index 8b8a8c6..c534eba 100644
--- a/init.lua
+++ b/init.lua
@@ -109,6 +109,7 @@ local function delete_lock_file(lfile_path)
 end
 
 vis.events.subscribe(vis.events.FILE_OPEN, function(file)
+  if not file.path then return end
   local lfile_path = lock_file_path(file.path)
   if not create_lock_file(lfile_path) and not confirm(lfile_path) then
     os.exit(1)
@@ -116,6 +117,7 @@ vis.events.subscribe(vis.events.FILE_OPEN, function(file)
 end)
 
 vis.events.subscribe(vis.events.FILE_CLOSE, function(file)
+  if not file.path then return end
   local lfile_path = lock_file_path(file.path)
   if created_locks[lfile_path] then
     delete_lock_file(lfile_path)