Re: crash on removal of userdata from the stack during GC call

[Roberto Ierusalimschy <roberto@...>]

> 2nd time I run into this; The GC method on a userdata appears to be unable
> to remove the userdata (the one being collected, at pos 1) from the stack.
> 
> In this case I have to forward the call to another function to do some
> housekeeping, which I do not want to have access to the userdata, so before
> making that call, I remove the userdata by calling lua_remove(L,1). But this
> then gets punished harshly with a crash.
> 
> It's not such a big deal to leave it there, just wondering why I can't
> remove it and whether there is a workaround to it.

It should be possible to remove it without any problem. It seems there
is a bug somewhere. Just in case, have you tried to compile Lua with
LUA_USE_APICHECK defined?

-- Roberto