check nils

Author: sumneko

script/core/completion/completion.lua

@@ -1876,6 +1876,9 @@ local function tryComment(state, position, results)
     local doc  = getluaDoc(state, position)
     if not word then
         local comment = getComment(state, position)
+        if not comment then
+            return
+        end
         if comment.type == 'comment.short'
         or comment.type == 'comment.cshort' then
             if comment.text == '' then

script/core/diagnostics/lowercase-global.lua

@@ -30,7 +30,7 @@ return function (uri, callback)
 
     guide.eachSourceType(ast.ast, 'setglobal', function (source)
         local name = guide.getKeyName(source)
-        if definedGlobal[name] then
+        if not name or definedGlobal[name] then
             return
         end
         local first = name:match '%w'

script/core/signature.lua

@@ -41,6 +41,9 @@ end
 ---@async
 local function makeOneSignature(source, oop, index)
     local label = hoverLabel(source, oop)
+    if not label then
+        return nil
+    end
     -- 去掉返回值
     label = label:gsub('%s*->.+', '')
     local params = {}

script/doctor.lua

@@ -175,6 +175,9 @@ m.snapshot = private(function ()
             exclude[o] = true
         end
     end
+    ---@generic T
+    ---@param o T
+    ---@return T
     local function private(o)
         if not o then
             return nil

script/utility.lua

@@ -315,8 +315,8 @@ function m.saveFile(path, content)
 end
 
 --- 计数器
----@param init integer {optional = 'after'}
----@param step integer {optional = 'after'}
+---@param init? integer
+---@param step? integer
 ---@return fun():integer
 function m.counter(init, step)
     if not step then