'print' does not call 'tostring' to format its arguments

testes/calls.lua

@@ -21,21 +21,6 @@ assert(type(f) == 'function')
 assert(not pcall(type))
 
 
-do    -- test error in 'print' too...
-  local tostring = _ENV.tostring
-
-  _ENV.tostring = nil
-  local st, msg = pcall(print, 1)
-  assert(st == false and string.find(msg, "attempt to call a nil value"))
-
-  _ENV.tostring = function () return {} end
-  local st, msg = pcall(print, 1)
-  assert(st == false and string.find(msg, "must return a string"))
-  
-  _ENV.tostring = tostring
-end
-
-
 -- testing local-function recursion
 fact = false
 do