Re: Bug report : (lstring.c:210) (ts)->shrlen != 0xFF

[Roberto Ierusalimschy <roberto@...>]

> 31 августа 2023 г. 12:24:38 GMT+03:00, "云风 Cloud Wu" <cloudwu@gmail.com> пишет:
> >I updated lua source from https://github.com/lua/lua today, and my
> >project crashed.
> >
> >I found the TString is not initialized before getshrstr().
> >
> >https://github.com/lua/lua/blob/master/lstring.c#L209-L211
> >
> >I think it should be :
> >
> >  ts = createstrobj(L, l, LUA_VSHRSTR, h);
> >  ts->shrlen = cast_byte(l);
> >  memcpy(getshrstr(ts), str, l * sizeof(char));
> >
> >The `ts->shrlen` should be initialized before memcpy().
>
> It was reported here
> https://marc.info/?l=lua-l&m=169289729129364&w=2

And, as far as we know, it shouldn't cause a crash, but only a failed
assert, if and only if asserts are on (which is not the default).

-- Roberto