Strange problem with strict.lua

[Bernd Eggink <monoped@...>]

Hi all,

I've just been struggling with a bug that caused my program to go into 
an infinite loop at a certain point for no obvious reason. As I'm in the 
habit of starting each source with "require strict", I didn't expect it 
to be something as simple as the usage of an undefined (and undeclared) 
global. I use the module from
http://metalua.luaforge.net/src/lib/strict.lua.html
It happens in the __index metafunction, which is defined like this:

mt.__index = function (t, n)
  if not mt.__declared[n] and debug.getinfo(2, "S").what ~= "C" then
     error("variable '"..n.."' is not declared", 2)
  end
  return rawget(t, n)
end

The baffling fact is that the function 'error' from the standard library 
loops and eats up 100% CPU, instead of aborting the program. If the line 
is replaced by os.exit(1), the program halts immediately.

Any ideas what may have caused such behaviour? I checked if the value of 
error had been changed, but it hasn't.

Regards,
Bernd

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