3 files changed, 65 insertions, 29 deletions
diff --git a/script-beta/core/completion.lua b/script-beta/core/completion.lua
index a19edb5e..b0f15f74 100644
--- a/script-beta/core/completion.lua
+++ b/script-beta/core/completion.lua
@@ -360,29 +360,15 @@ end]]
 end},
 {'function', function (ast, text, start, results)
     if config.config.completion.keywordSnippet then
-        local spStart = skipSpace(text, start - 1)
-        local before  = findWord(text, spStart)
-        if before == 'local' then
-            results[#results+1] = {
-                label = 'function ()',
-                kind  = ckind.Snippet,
-                insertTextFormat = 2,
-                insertText = [[
-function ($1)
-    $0
-end]]
-            }
-        else
-            results[#results+1] = {
-                label = 'function ()',
-                kind  = ckind.Snippet,
-                insertTextFormat = 2,
-                insertText = [[
+        results[#results+1] = {
+            label = 'function ()',
+            kind  = ckind.Snippet,
+            insertTextFormat = 2,
+            insertText = [[
 function $1($2)
     $0
 end]]
-            }
-        end
+        }
     end
 end},
 {'goto'},
diff --git a/script-beta/core/diagnostics/unused-local.lua b/script-beta/core/diagnostics/unused-local.lua
index 22b2e16b..294a86e5 100644
--- a/script-beta/core/diagnostics/unused-local.lua
+++ b/script-beta/core/diagnostics/unused-local.lua
@@ -7,19 +7,46 @@ local function hasGet(loc)
     if not loc.ref then
         return false
     end
+    local weak
     for _, ref in ipairs(loc.ref) do
         if ref.type == 'getlocal' then
             if not ref.next then
-                return true
+                return 'strong'
             end
             local nextType = ref.next.type
             if  nextType ~= 'setmethod'
             and nextType ~= 'setfield'
             and nextType ~= 'setindex' then
-                return true
+                return 'strong'
+            else
+                weak = true
             end
         end
     end
+    if weak then
+        return 'weak'
+    else
+        return nil
+    end
+end
+
+local function isMyTable(loc)
+    local value = loc.value
+    if value and value.type == 'table' then
+        return true
+    end
+    return false
+end
+
+local function isClose(source)
+    if not source.attrs then
+        return false
+    end
+    for _, attr in ipairs(source.attrs) do
+        if attr[1] == 'close' then
+            return true
+        end
+    end
     return false
 end
 
@@ -34,13 +61,33 @@ return function (uri, callback)
         or name == '_ENV' then
             return
         end
-        if not hasGet(source) then
-            callback {
-                start   = source.start,
-                finish  = source.finish,
-                tags    = { define.DiagnosticTag.Unnecessary },
-                message = lang.script('DIAG_UNUSED_LOCAL', name),
-            }
+        if isClose(source) then
+            return
+        end
+        local data = hasGet(source)
+        if data == 'strong' then
+            return
+        end
+        if data == 'weak' then
+            if not isMyTable(source) then
+                return
+            end
+        end
+        callback {
+            start   = source.start,
+            finish  = source.finish,
+            tags    = { define.DiagnosticTag.Unnecessary },
+            message = lang.script('DIAG_UNUSED_LOCAL', name),
+        }
+        if source.ref then
+            for _, ref in ipairs(source.ref) do
+                callback {
+                    start   = ref.start,
+                    finish  = ref.finish,
+                    tags    = { define.DiagnosticTag.Unnecessary },
+                    message = lang.script('DIAG_UNUSED_LOCAL', name),
+                }
+            end
         end
     end)
 end
diff --git a/script-beta/parser/ast.lua b/script-beta/parser/ast.lua
index 42bbb751..43335950 100644
--- a/script-beta/parser/ast.lua
+++ b/script-beta/parser/ast.lua
@@ -1077,6 +1077,9 @@ local Defs = {
         return tableUnpack(keys)
     end,
     LocalAttr = function (attrs)
+        if #attrs == 0 then
+            return nil
+        end
         for i = 1, #attrs do
             local attr = attrs[i]
             local attrAst = attr