FastHiveDecimal throws Exception (RuntimeException: Unexpected #3)

with t1 as (
...
...
)
select id, max(abs(c1))) from t1 group by id;

g.Thread.run(Thread.java:748)
Caused by: org.apache.hadoop.hive.ql.metadata.HiveException: org.apache.hadoop.hive.ql.metadata.HiveException: org.apache.hadoop.hive.ql.metadata.HiveException: java.lang.RuntimeException: Unexpected #3
 at org.apache.hadoop.hive.ql.exec.GroupByOperator.closeOp(GroupByOperator.java:1126)
 at org.apache.hadoop.hive.ql.exec.Operator.close(Operator.java:697)
 at org.apache.hadoop.hive.ql.exec.Operator.close(Operator.java:711)
 at org.apache.hadoop.hive.ql.exec.Operator.close(Operator.java:711)
 at org.apache.hadoop.hive.ql.exec.Operator.close(Operator.java:711)
 at org.apache.hadoop.hive.ql.exec.Operator.close(Operator.java:711)
....
...
Caused by: org.apache.hadoop.hive.ql.metadata.HiveException: org.apache.hadoop.hive.ql.metadata.HiveException: java.lang.RuntimeException: Unexpected #3
    at org.apache.hadoop.hive.ql.exec.GroupByOperator.flush(GroupByOperator.java:1084)
    at org.apache.hadoop.hive.ql.exec.GroupByOperator.closeOp(GroupByOperator.java:1123)
    ... 18 more
Caused by: org.apache.hadoop.hive.ql.metadata.HiveException: java.lang.RuntimeException: Unexpected #3
    at org.apache.hadoop.hive.ql.exec.ReduceSinkOperator.process(ReduceSinkOperator.java:397)
    at org.apache.hadoop.hive.ql.exec.Operator.forward(Operator.java:897)
    at org.apache.hadoop.hive.ql.exec.GroupByOperator.forward(GroupByOperator.java:1047)
    at org.apache.hadoop.hive.ql.exec.GroupByOperator.flush(GroupByOperator.java:1067)
    ... 19 more