13 files changed, 93 insertions, 2 deletions
diff --git a/changelog.md b/changelog.md
index 6b657aa4..6ba54a96 100644
--- a/changelog.md
+++ b/changelog.md
@@ -13,6 +13,8 @@
   ```
 * `NEW` diagnostics:
   * `unknown-operator`
+* `NEW` settings:
+  * `diagnostics.unusedLocalExclude`
 * `FIX` [#1284](https://github.com/sumneko/lua-language-server/issues/1284)
 * `FIX` [#1292](https://github.com/sumneko/lua-language-server/issues/1292)
 * `FIX` [#1294](https://github.com/sumneko/lua-language-server/issues/1294)
diff --git a/doc/en-us/config.md b/doc/en-us/config.md
index 038cf920..3f483650 100644
--- a/doc/en-us/config.md
+++ b/doc/en-us/config.md
@@ -891,6 +891,22 @@ object<string, string>
 }
 ```
 
+# diagnostics.unusedLocalExclude
+
+Do not diagnose `unused-local` when the variable name matches the following pattern.
+
+## type
+
+```ts
+Array<string>
+```
+
+## default
+
+```jsonc
+[]
+```
+
 # diagnostics.workspaceDelay
 
 Latency (milliseconds) for workspace diagnostics. When you start the workspace, or edit any file, the entire workspace will be re-diagnosed in the background. Set to negative to disable workspace diagnostics.
diff --git a/doc/pt-br/config.md b/doc/pt-br/config.md
index 479a6add..f888efea 100644
--- a/doc/pt-br/config.md
+++ b/doc/pt-br/config.md
@@ -891,6 +891,22 @@ object<string, string>
 }
 ```
 
+# diagnostics.unusedLocalExclude
+
+Do not diagnose `unused-local` when the variable name matches the following pattern.
+
+## type
+
+```ts
+Array<string>
+```
+
+## default
+
+```jsonc
+[]
+```
+
 # diagnostics.workspaceDelay
 
 Latency (milliseconds) for workspace diagnostics. When you start the workspace, or edit any file, the entire workspace will be re-diagnosed in the background. Set to negative to disable workspace diagnostics.
diff --git a/doc/zh-cn/config.md b/doc/zh-cn/config.md
index a315b168..3e2b1246 100644
--- a/doc/zh-cn/config.md
+++ b/doc/zh-cn/config.md
@@ -890,6 +890,22 @@ object<string, string>
 }
 ```
 
+# diagnostics.unusedLocalExclude
+
+如果变量名匹配以下规则，则不对其进行 `unused-local` 诊断。
+
+## type
+
+```ts
+Array<string>
+```
+
+## default
+
+```jsonc
+[]
+```
+
 # diagnostics.workspaceDelay
 
 进行工作区诊断的延迟（毫秒）。当你启动工作区，或编辑了任意文件后，将会在后台对整个工作区进行重新诊断。设置为负数可以禁用工作区诊断。
diff --git a/doc/zh-tw/config.md b/doc/zh-tw/config.md
index 3fff6c6d..dcd44d63 100644
--- a/doc/zh-tw/config.md
+++ b/doc/zh-tw/config.md
@@ -890,6 +890,22 @@ object<string, string>
 }
 ```
 
+# diagnostics.unusedLocalExclude
+
+Do not diagnose `unused-local` when the variable name matches the following pattern.
+
+## type
+
+```ts
+Array<string>
+```
+
+## default
+
+```jsonc
+[]
+```
+
 # diagnostics.workspaceDelay
 
 進行工作區診斷的延遲（毫秒）。當你啟動工作區，或編輯了任何檔案後，將會在背景對整個工作區進行重新診斷。設定為負數可以停用工作區診斷。
diff --git a/locale/en-us/setting.lua b/locale/en-us/setting.lua
index 5ce69de7..f35edac4 100644
--- a/locale/en-us/setting.lua
+++ b/locale/en-us/setting.lua
@@ -97,6 +97,8 @@ config.diagnostics.ignoredFiles.Disable  =
 "These files are not diagnosed."
 config.diagnostics.disableScheme  =
 'Do not diagnose Lua files that use the following scheme.'
+config.diagnostics.unusedLocalExclude =
+'Do not diagnose `unused-local` when the variable name matches the following pattern.'
 config.workspace.ignoreDir        =
 "Ignored files and directories (Use `.gitignore` grammar)."-- .. example.ignoreDir,
 config.workspace.ignoreSubmodules =
diff --git a/locale/pt-br/setting.lua b/locale/pt-br/setting.lua
index e8271ce5..b673e90f 100644
--- a/locale/pt-br/setting.lua
+++ b/locale/pt-br/setting.lua
@@ -97,6 +97,8 @@ config.diagnostics.ignoredFiles.Disable  = -- TODO: need translate!
 "These files are not diagnosed."
 config.diagnostics.disableScheme  = -- TODO: need translate!
 'Do not diagnose Lua files that use the following scheme.'
+config.diagnostics.unusedLocalExclude = -- TODO: need translate!
+'Do not diagnose `unused-local` when the variable name matches the following pattern.'
 config.workspace.ignoreDir        = -- TODO: need translate!
 "Ignored files and directories (Use `.gitignore` grammar)."-- .. example.ignoreDir,
 config.workspace.ignoreSubmodules = -- TODO: need translate!
diff --git a/locale/zh-cn/setting.lua b/locale/zh-cn/setting.lua
index 54de9293..5fa4bf8b 100644
--- a/locale/zh-cn/setting.lua
+++ b/locale/zh-cn/setting.lua
@@ -96,6 +96,8 @@ config.diagnostics.ignoredFiles.Disable  =
 "不诊断这些文件。"
 config.diagnostics.disableScheme  =
 '不诊断使用以下 scheme 的lua文件。'
+config.diagnostics.unusedLocalExclude =
+'如果变量名匹配以下规则，则不对其进行 `unused-local` 诊断。'
 config.workspace.ignoreDir        =
 "忽略的文件与目录（使用 `.gitignore` 语法）。"
 config.workspace.ignoreSubmodules =
diff --git a/locale/zh-tw/setting.lua b/locale/zh-tw/setting.lua
index 17a3435a..9ff8e1a7 100644
--- a/locale/zh-tw/setting.lua
+++ b/locale/zh-tw/setting.lua
@@ -96,6 +96,8 @@ config.diagnostics.ignoredFiles.Disable  =
 "不診斷這些檔案。"
 config.diagnostics.disableScheme  =
 '不診斷使用以下 scheme 的lua檔案。'
+config.diagnostics.unusedLocalExclude = -- TODO: need translate!
+'Do not diagnose `unused-local` when the variable name matches the following pattern.'
 config.workspace.ignoreDir        =
 "忽略的檔案與目錄（使用 `.gitignore` 語法）。"
 config.workspace.ignoreSubmodules =
diff --git a/script/config/template.lua b/script/config/template.lua
index 4e2f45ae..fa0c2772 100644
--- a/script/config/template.lua
+++ b/script/config/template.lua
@@ -300,6 +300,7 @@ local template = {
                                                 'Opened',
                                                 'Disable',
                                             },
+    ['Lua.diagnostics.unusedLocalExclude']   = Type.Array(Type.String),
     ['Lua.workspace.ignoreDir']             = Type.Array(Type.String) >> {
                                                 '.vscode',
                                             },
diff --git a/script/core/completion/completion.lua b/script/core/completion/completion.lua
index c577874f..c882f283 100644
--- a/script/core/completion/completion.lua
+++ b/script/core/completion/completion.lua
@@ -2075,8 +2075,6 @@ local function completion(uri, position, triggerCharacter)
         return nil
     end
     clearStack()
-    vm.lockCache()
-    local _ <close> = vm.unlockCache
     local results = {}
     tracy.ZoneBeginN 'completion #2'
     tryCompletions(state, position, triggerCharacter, results)
diff --git a/script/core/diagnostics/unused-local.lua b/script/core/diagnostics/unused-local.lua
index 8bff7dcb..8f2ee217 100644
--- a/script/core/diagnostics/unused-local.lua
+++ b/script/core/diagnostics/unused-local.lua
@@ -3,6 +3,8 @@ local guide  = require 'parser.guide'
 local define = require 'proto.define'
 local lang   = require 'language'
 local vm     = require 'vm.vm'
+local config = require 'config.config'
+local glob   = require 'glob'
 
 local function hasGet(loc)
     if not loc.ref then
@@ -88,12 +90,17 @@ return function (uri, callback)
     if not ast then
         return
     end
+    local ignorePatterns = config.get(uri, 'Lua.diagnostics.unusedLocalExclude')
+    local ignore = glob.glob(ignorePatterns)
     guide.eachSourceType(ast.ast, 'local', function (source)
         local name = source[1]
         if name == '_'
         or name == ast.ENVMode then
             return
         end
+        if ignore(name) then
+            return
+        end
         if isToBeClosed(source) then
             return
         end
diff --git a/test/diagnostics/common.lua b/test/diagnostics/common.lua
index 27e92676..59a56981 100644
--- a/test/diagnostics/common.lua
+++ b/test/diagnostics/common.lua
@@ -1907,3 +1907,14 @@ TEST [[
 ---@class A
 ---@operator <!xxx!>: A
 ]]
+
+config.add(nil, 'Lua.diagnostics.unusedLocalIgnore', 'll_*')
+
+TEST [[
+local <!xx!>
+local ll_1
+local ll_2
+local <!ll!>
+]]
+
+config.remove(nil, 'Lua.diagnostics.unusedLocalIgnore', 'll_*')