Re: [ANN] Lua 5.4.0 (beta) now available

[actboy168 <actboy168@...>]

Thank you for your detailed explanation.

On Mon, Nov 4, 2019 at 10:54 PM Roberto Ierusalimschy <roberto@inf.puc-rio.br> wrote:

> https://github.com/lua/lua/blob/6e1aec7a677a9891f2f8ca57e039d9984fdc69bc/lvm.c#L1085
>
>
>   lua_assert(isIT(i) || (L->top = base));
>
> should be:
>
>  lua_assert(isIT(i) || (L->top == base));
>
> I think.

Strange as it is, this is correct. See previous comment:

    /* invalidate top for instructions not expecting it */
    lua_assert(isIT(i) || (L->top = base));

The idea is that only opcodes marked with 'isIT' should use L->top.
To test this, all other opcodes set L->top to an "absurd" value
(base, so that it is out of the range of valid registers) to force
some error if it is used.

-- Roberto

--

-- actboy168