Low Description
I am seeing an NPE on the latest 2.1 branch with this sequence of deletes from a list - first delete the entire list, then attempt to delete one element.
I expected to see List index 0 out of bound, list has size 0 but instead got an NPE.
./bin/cqlsh
Connected to Test Cluster at 127.0.0.1:9042.
[cqlsh 5.0.1 | Cassandra 2.1.3-SNAPSHOT | CQL spec 3.2.0 | Native protocol v3]
Use HELP for help.
cqlsh> use frozen_collections ;
cqlsh:frozen_collections> DROP TABLE IF EXISTS t;
cqlsh:frozen_collections> CREATE TABLE t (id text PRIMARY KEY, l list<text>, s set<text>);
cqlsh:frozen_collections> INSERT INTO t (id, l, s) VALUES ('user', ['1'], {'1'});
cqlsh:frozen_collections>
cqlsh:frozen_collections> DELETE l FROM t WHERE id ='user';
cqlsh:frozen_collections> //INSERT INTO t (id, l) VALUES ('user', ['1']);
cqlsh:frozen_collections> DELETE l[0] FROM t WHERE id = 'user';
ServerError: <ErrorMessage code=0000 [Server error] message="java.lang.NullPointerException">
cqlsh:frozen_collections>
cqlsh:frozen_collections> DELETE s FROM t WHERE id ='user';
cqlsh:frozen_collections> DELETE s['1'] FROM t WHERE id = 'user';
It appears the DELETE emails... directly followed by DELETE emails[0]... is the offending sequence. Either one alone works fine, as does adding an intervening insert/update.
The same sequence performed on a Set rather than List works (as shown above).