Consider using xpcall in try block #1478

Error message from pcall only include the first line that error happened but not the full stack traceback, but this can be done by compiling to using xpcall and pass debug.traceback as second arg:

local result
local function ____catch(err)
    print("catch:", err)
end
local ____try, ____hasReturned = xpcall(
    function()
        result = dosomething(args)
    end,
    debug.traceback
)
if not ____try then
    ____catch(____hasReturned)
end

Although custom plugin can implement this feature, but plugin can not rewrite lualib such as pcall in Promise.lua