Re: Nasty GC bug

[Dmitry Antipov]

On 08/24/2012 12:56 PM, Paul Eggert wrote:

> Thanks for finding this bug.
>
> That patch doesn't look quite right if ! USE_LSB_TAG, since
> in that case lisp_align_malloc won't correctly report a
> failure in the section of code that checks whether the
> memory just allocated can be addressed through a Lisp
> object's pointer.  Also, what about dont_register_blocks
> and allocated_mem_type?
>
> Instead, how about marking the spare conses with Vdead
> and the spare strings with NULL data?  Admittedly I
> haven't had time to think this through....

This implies initialization of the data which we will never
use; what about the special memory type, e.g. MEM_TYPE_SPARE?

Dmitry