Odd GC recursion

["Tom Spilman" <tom@...>]

 I'm seeing a lot of function recursion on the stack while executing this
loop using Lua 5.1 (work2):

	for i=0, 1000 do
		point2()
	end

 The function point2() just returns a userdata with metatable and __gc
method... It doesn't do any lua_calls.  If 1000 is changed to 10000 the
executable crashes when it runs out of stack space.  I get this repeating
sequence of calls on the stack...

  GCTM(lua_State * L=0x00b62838)  Line 475 + 0x15	C
  singlestep(lua_State * L=0x00b62838)  Line 604 + 0x9	C
  luaC_step(lua_State * L=0x00b62838)  Line 623 + 0x9	C
  luaD_call(lua_State * L=0x00b62838, ...)  Line 353 + 0x1d	C
  GCTM(lua_State * L=0x00b62838)  Line 475 + 0x15	C
  singlestep(lua_State * L=0x00b62838)  Line 604 + 0x9	C
  luaC_step(lua_State * L=0x00b62838)  Line 623 + 0x9	C
  luaD_call(lua_State * L=0x00b62838, ...)  Line 353 + 0x1d	C
  GCTM(lua_State * L=0x00b62838)  Line 475 + 0x15	C

 Anything I could have done in setting up my userdata which would cause
this?

  Tom Spilman
  Co-owner | Programmer
  www.sickheadgames.com