fix #1430

Author: sumneko

changelog.md

@@ -5,6 +5,7 @@
 * `FIX` [#1422](https://github.com/sumneko/lua-language-server/issues/1422)
 * `FIX` [#1425](https://github.com/sumneko/lua-language-server/issues/1425)
 * `FIX` [#1428](https://github.com/sumneko/lua-language-server/issues/1428)
+* `FIX` [#1430](https://github.com/sumneko/lua-language-server/issues/1430)
 
 ## 3.5.2
 `2022-8-1`

script/vm/compiler.lua

@@ -373,7 +373,8 @@ function vm.getClassFields(suri, object, key, ref, pushResult)
                         local fieldKey = guide.getKeyName(field)
                         if fieldKey and not searchedFields[fieldKey] then
                             if  not searchedFields[fieldKey]
-                            and guide.isSet(field) then
+                            and guide.isSet(field)
+                            and guide.isLiteral(field.value) then
                                 hasFounded[fieldKey] = true
                                 pushResult(field, true)
                             end

test/type_inference/init.lua

@@ -3761,3 +3761,15 @@ TEST 'integerA' [[
 for <?i?> = 1, 10 do
 end
 ]]
+
+TEST 'string' [[
+---@class A
+---@field x string
+
+---@class B : A
+local t = {}
+
+t.x = t.x
+
+print(t.<?x?>)
+]]