Re: Issues with error(msg, 0)

[Philipp Janda <siffiejoe@...>]

Am 23.11.2014 um 15:58 schröbte Thiago L.:
> Lua 5.2.3  Copyright (C) 1994-2013 Lua.org, PUC-Rio
>  > xpcall(function() error("Hi!", 0) end, function(h) print(h)
> print(debug.traceback()) end)
> Hi!
> stack traceback:
>      stdin:1: in function <stdin:1>
>      [C]: in function 'error'
>      stdin:1: in function <stdin:1>
>      [C]: in function 'xpcall'
>      stdin:1: in main chunk
>      [C]: in ?
>
> Why's it giving me a stacktrace?

Because you called `debug.traceback`.

> I thought error(msg, 0) would hide them?

No. According to the Lua manual `error(msg, 0)` only leaves out the 
extra information about the error location (more specifically file name 
and line number) normally prepended to the error message. See [1] and [2].

Philipp

  [1]: http://www.lua.org/manual/5.2/manual.html#pdf-error
  [2]: http://www.lua.org/manual/5.2/manual.html#luaL_where