On 5/27/2020 9:21 AM, Hironobu Yamashita wrote:
Hi,
Thanh has committed a fix to the pdftex repo (r828).
Thanks. I think the additions of (r<>null) are no-op thus can be removed. (It does no harm, though.)
if there is a loop over a list you want to quit when you run out of items; vlink(n) doesn't do a check if n equals null, it accesses a field in a node (and likely the next field in a null node is some weird random value which then brings you to whatever memory is related etc)
I wonder if there is still some possibility of uninitialized save_tail (which is 0, not null). null is actually 0 in tex
when used this way save-tail is just a number pointing to a slot in a memory array where a node blob (of whatever length) sits Hans ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl -----------------------------------------------------------------