Re: errors needs to be tostring()'d

[Roberto Ierusalimschy <roberto@...>]

> It would be nice if it did a tostring() on the error message; so that
> you could use error objects with a __tostring metamethod: error (
> setmetatable({"Failure is ","an option"},{__tostring=table.concat})
> 
> See http://www.lua.org/source/5.1/lua.c.html#report
> 
> It is the same way in luajit and 5.2

I don't think it is the same with 5.2:

  roberto@roberto:~/prj/lua$ lua
  Lua 5.2.0  Copyright (C) 1994-2011 Lua.org, PUC-Rio
  > error (
  >> setmetatable({"Failure is ","an option"},{__tostring=table.concat})
  >> )
  Failure is an option

-- Roberto