Last memory poisonning patch immediately made this issue appear.
The unique_id field is released but not properly initialized. The
feature was introduced very recently, no backport is needed.
s->srv_error = default_srv_error;
s->uniq_id = 0;
+ s->unique_id = NULL;
txn = &s->txn;
/* Those variables will be checked and freed if non-NULL in
LIST_ADDQ(&sessions, &s->list);
LIST_INIT(&s->back_refs);
+ s->unique_id = NULL;
s->term_trace = 0;
s->si[0].addr.from = *addr;
s->logs.accept_date = date; /* user-visible date for logging */