do not index a nil value when no formatting edits are returned

The method textDocument/formatting is allowed to return null/nil which
was directly passed to vis_apply_textEdits causing an exception
when trying to iterate the textEdits table.

Only pass the result of textDocument/formatting to vis_apply_textEdits
if there is an actual result.

Fixes: e83950a7149f364b653395cdd4d9446875a7f469

1 files changed, 4 insertions, 1 deletions

diff --git a/init.lua b/init.lua
index 436fabe..33cb547 100644
--- a/init.lua
+++ b/init.lua
@@ -822,7 +822,10 @@ local function lspc_handle_rename_method_response(win, result)
 end
 
 local function lspc_handle_formatting_method_response(win, result)
-  vis_apply_textEdits(win, win.file, result)
+  -- The result of textDocument/formatting is defined as TextEdit[] | null
+  if result then
+    vis_apply_textEdits(win, win.file, result)
+  end
 end
 
 local function lspc_handle_initialize_response(ls, result)