Invalid double function call syntax is not squiggled for Lua version 5.2 and prior

[sewbacca]

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?

Diagnostics/Syntax Checking

Expected Behaviour

Syntax squiggles, notifying invalid Lua code, if the version is set to Lua 5.2, Lua 5.1 or Lua JIT.
Expected error: lua5.1: luatest.lua:9: ambiguous syntax (function call x new statement) near '('

Actual Behaviour

Syntax is accepted, as it would be expected for Lua 5.3 and Lua 5.4.

Reproduction steps

local function nestedFunction(name)
	return function(f)
		f()
	end
end

nestedFunction "My function"
(function ()
	print "Hello"
end)

Additional Notes

Correct function call for 5.2 and prior would be:

nestedFunction "My function" (
function ()
	print "Hello"
end)

Log File

No response

[sumneko]

I have tested it is valid in Lua 5.2