fix(utils): pcall protect `do_or_fail`

src/awesomewm.d.tl/utils.tl

@@ -58,9 +58,9 @@ end
 -- At some point, we should probably write a wrapper to make penlight's function work with pcalls.
 function utils.do_or_fail<T>(func: function<T>(...: any): (T | nil, string), ...: any): T
    local log = require "logger"
-   local res, err = func(...)
+   local ok, res, err = pcall(func, ...)
 
-   if not res then
+   if not (ok and res) then
       log:error { "do_or_fail failed!", error = err }
       error(err)
    end