How to repeat:

1) <option> is missing and does not work with replication
mysqlslap \
--delimiter=";" \
--create="CREATE TABLE A (a int);INSERT INTO A Values (23)" \
--query="SELECT * FROM A" \
--concurrency=1 \
--iterations=1 \
--engine=memory:max_rows=200 \
-vvvvv \
--post-system="echo SHOW CREATE TABLE A | mysql -uroot mysqlslap"

...
set storage_engine=`memory`;
CREATE TABLE A (a int);
INSERT INTO A Values (23);
Generating primary key list
connected!
SELECT * FROM A;
Table Create Table
A CREATE TABLE `A` (\n `a` int(11) DEFAULT NULL\n) ENGINE=MEMORY DEFAULT CHARSET=latin1
Generating stats
Benchmark
Running for engine memory
Average number of seconds to run all queries: 0.060 seconds
Minimum number of seconds to run all queries: 0.060 seconds
Maximum number of seconds to run all queries: 0.060 seconds
Number of clients running queries: 1
Average number of queries per client: 1

DROP SCHEMA IF EXISTS `mysqlslap`;

2) Crashing
mysqlslap \
--delimiter=";" \
--create="CREATE TABLE A (a int);INSERT INTO A Values (23)" \
--query="SELECT * FROM A" \
--concurrency=1 \
--iterations=1 \
--engine=memory:max_rows=200,innodb, myisam \
-vvvvv \
--post-system="echo SHOW CREATE TABLE A | mysql -uroot mysqlslap"

...
Parsing engines to use.
Segmentation fault

Both bugs are connected to an unintialized buffer usage.