Only snapshot builds 26824 and 26825 are affected.
Run isql and execute:
create database 'a';
create table a(id int);
insert into a values(1);
Do not commit anything. Then do:
killall -9 isql
Server will crash.
Bug probably introduced with commit 11366: This should fix
: SuperServer dies when client is disconnected abnormally during the index navigational scan.
Commit slightly changed attachment release order so now all attachment requests released before dsql_dbb instance destroying which have pointers to already destroyed requests. On second releasing of requests server crashing.