Re: LuaJIT Crash When Returning Null Pointer from FFI
- From: Mike Pall <mike-1407@xxxxxxxxxx>
- To: luajit@xxxxxxxxxxxxx
- Date: Tue, 22 Jul 2014 21:23:57 +0200
Jim Burnes wrote:
> Mike Pall wrote:
> >This function is only called if you're indexing the returned
> >pointer yourself. For example by accessing fd.fd in a __tostring
> >metamethod.
> I am using __tostring on it. So am I prevented from using metamethods when
> returning NULLs or should I used some other technique?
No, you can use __tostring. But you better check for a NULL
pointer before dereferencing a field.
I mean, you wrote that method, right? The default __tostring
handler of the FFI doesn't dereference pointers, so it must be
your code.
--Mike
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