fix(languagetree): avoid language self-injection

This avoids some stack overflows when a language includes itself.
This is a temporary solution, and will be addressed later when actually
managing our own parsers.

lua/nvim-treesitter/languagetree.lua

@@ -116,8 +116,14 @@ function LanguageTree:update()
   local seen = {}
 
   -- Update each child accordingly
+  -- TODO(vigoux): for now avoid languages that include themselves, will
+  -- be fixed when managing our own parsers
   for lang, ranges in pairs(injections) do
+
+    if lang ~= self.parser.lang then
+
       if not self.children[lang] then
+        vim.api.nvim_err_writeln("Creating node for language " .. lang)
         self.children[lang] = LanguageTree.new(self.parser.bufnr, lang, true)
       end
 
@@ -127,6 +133,7 @@ function LanguageTree:update()
         seen[lang] = true
       end
     end
+  end
 
   -- Clean up unused parsers
   for lang, _ in pairs(self.children) do