1 files changed, 32 insertions, 0 deletions
diff --git a/script-beta/src/core/diagnostics/undefined-env-child.lua b/script-beta/src/core/diagnostics/undefined-env-child.lua
new file mode 100644
index 00000000..df096cb8
--- /dev/null
+++ b/script-beta/src/core/diagnostics/undefined-env-child.lua
@@ -0,0 +1,32 @@
+local files  = require 'files'
+local guide  = require 'parser.guide'
+local vm     = require 'vm'
+local lang   = require 'language'
+
+return function (uri, callback)
+    local ast = files.getAst(uri)
+    if not ast then
+        return
+    end
+    -- 再遍历一次 getglobal ，找出 _ENV 被重载的情况
+    guide.eachSourceType(ast.ast, 'getglobal', function (source)
+        -- 单独验证自己是否在重载过的 _ENV 中有定义
+        if source.node.tag == '_ENV' then
+            return
+        end
+        local setInENV = vm.eachRef(source, function (info)
+            if info.mode == 'set' then
+                return true
+            end
+        end)
+        if setInENV then
+            return
+        end
+        local key = source[1]
+        callback {
+            start   = source.start,
+            finish  = source.finish,
+            message = lang.script('DIAG_UNDEF_ENV_CHILD', key),
+        }
+    end)
+end