don't treat `_ENV` as param

fix #1715

2 files changed, 16 insertions, 0 deletions

diff --git a/script/core/diagnostics/global-in-nil-env.lua b/script/core/diagnostics/global-in-nil-env.lua
index e154080c..daf1f99d 100644
--- a/script/core/diagnostics/global-in-nil-env.lua
+++ b/script/core/diagnostics/global-in-nil-env.lua
@@ -13,6 +13,9 @@ return function (uri, callback)
         if node.tag == '_ENV' then
             return
         end
+        if guide.isParam(node) then
+            return
+        end
 
         if not node.value or node.value.type == 'nil' then
             callback {
diff --git a/script/parser/guide.lua b/script/parser/guide.lua
index ec5746c1..e7eb3751 100644
--- a/script/parser/guide.lua
+++ b/script/parser/guide.lua
@@ -1276,4 +1276,17 @@ function m.getTopBlock(source)
     return nil
 end
 
+---@param source parser.object
+---@return boolean
+function m.isParam(source)
+    if  source.type ~= 'local'
+    and source.type ~= 'self' then
+        return false
+    end
+    if source.parent.type ~= 'funcargs' then
+        return false
+    end
+    return true
+end
+
 return m