INSERT using RAND(): Memory leaked via FunctionContext::Allocate()

[nightly-3.vpc.cloudera.com:21000] > create table t as select rand() from sample_07;
Query: create table t as select rand() from sample_07
+---------------------+
| summary             |
+---------------------+
| Inserted 823 row(s) |
+---------------------+
WARNINGS: UDF WARNING: Memory leaked via FunctionContext::Allocate()