Class inheriting a generic class with specified type not recognized as inherited class (assign-type-mismatch)

How are you using the lua-language-server?

Visual Studio Code Extension (sumneko.lua)

Which OS are you using?

Windows

What is the issue affecting?

Type Checking

Expected Behaviour

The type of a class inheriting a generic class (when specifying the type) should be recognized as the same type as the class it inherits.
If that generic class inherits another class, that should also be recognized.
As such, the following code should have no problems.

--- @class Test_Base
--- @field Str_A string
local Test_Base = {}

--- @generic T
--- @class Test_Generic<T> : Test_Base
--- @field Gen_T T
local Test_Generic = {}

--- @class Test_Class : Test_Generic<string>
local Test_Class = {}

--- @type Test_Base[]
local testArray = {
    Test_Base,
    Test_Generic,
    Test_Class,
}

Actual Behaviour

"Test_Class" isn't recognized as either "Test_Generic" or "Test_Base", therefore showing as an "assign-type-mismatch" error.

However, inheriting the generic class without specifying the type is completely fine.

--- @class Test_Base
--- @field Str_A string
local Test_Base = {}

--- @generic T
--- @class Test_Generic<T> : Test_Base
--- @field Gen_T T
local Test_Generic = {}

--- @class Test_Class : Test_Generic
local Test_Class = {}

--- @type Test_Base[]
local testArray = {
    Test_Base,
    Test_Generic,
    Test_Class,
}

Reproduction steps

--- @class Test_Base
--- @field Str_A string
local Test_Base = {}

--- @generic T
--- @class Test_Generic<T> : Test_Base
--- @field Gen_T T
local Test_Generic = {}

--- @class Test_Class1 : Test_Generic<string>
local Test_Class1 = {}

--- @class Test_Class2 : Test_Generic
local Test_Class2 = {}

--- @type Test_Base[]
local testArray = {
    Test_Base,
    Test_Generic,
    Test_Class1,
    Test_Class2,
}

Additional Notes

This problem showed up after the release of version 3.17.0

I know that the implementation of generics is complicated, and I've already found a workaround for my use-case by casting the inheriting classes to the type of the underlying base class. But that may not work for others.

Log File

No response

從 issue 中的 Lua 重現開始，將其通過 Visual Studio Code 擴充功能的型別檢查，以觀察 assign-type-mismatch 診斷。追蹤泛型類別繼承的處理，然後驗證 Test_Class1 同時作為 Test_Generic 和 Test_Base 都能被接受，包括傳遞繼承的情況，同時現有的 Test_Class2 行為仍保持有效。