fix #1506

Author: sumneko

changelog.md

@@ -1,5 +1,8 @@
 # changelog
 
+## 3.6.0
+* `FIX` [#1506](https://github.com/sumneko/lua-language-server/issues/1506)
+
 ## 3.5.5
 `2022-9-7`
 * `FIX` [#1529](https://github.com/sumneko/lua-language-server/issues/1529)

script/vm/infer.lua

@@ -301,16 +301,6 @@ function mt:_eraseAlias(uri)
                         end
                     end
                 end
-                if set.type == 'doc.class' then
-                    if set.extends then
-                        for _, ext in ipairs(set.extends) do
-                            if ext.type == 'doc.extends.name' then
-                                local view = ext[1]
-                                drop[view] = true
-                            end
-                        end
-                    end
-                end
             end
             LOCK[n.name] = nil
             ::CONTINUE::

test/type_inference/init.lua

@@ -3783,3 +3783,11 @@ local x
 
 local <?v?> = t[x]
 ]]
+
+TEST 'A|B' [[
+---@class A
+---@class B: A
+
+---@type A|B
+local <?t?>
+]]