MaxScale 1.1.1 crashed with Signal 11

After several weeks MaxScale 1.1.1 first crashed with signal 6, and the day after with signal 11:

2015-08-27 08:07:31 Fatal: MaxScale received fatal signal 11. Attempting backtrace.
2015-08-27 08:07:31 /usr/local/mariadb-maxscale/bin/maxscale() [0x54979c]
2015-08-27 08:07:31 /lib64/libpthread.so.0() [0x3588c0f710]
2015-08-27 08:07:31 /usr/local/mariadb-maxscale/modules/libreadwritesplit.so(+0x3bfb) [0x7f293ccb7bfb]
2015-08-27 08:07:31 /usr/local/mariadb-maxscale/modules/libreadwritesplit.so(+0x4d34) [0x7f293ccb8d34]
2015-08-27 08:07:31 /usr/local/mariadb-maxscale/modules/libreadwritesplit.so(+0x4767) [0x7f293ccb8767]
2015-08-27 08:07:31 /usr/local/mariadb-maxscale/modules/libMySQLClient.so(+0x4c53) [0x7f292905cc53]
2015-08-27 08:07:31 /usr/local/mariadb-maxscale/modules/libMySQLClient.so(+0x39c6) [0x7f292905b9c6]
2015-08-27 08:07:31 /usr/local/mariadb-maxscale/bin/maxscale() [0x55b9c1]
2015-08-27 08:07:31 /usr/local/mariadb-maxscale/bin/maxscale(poll_waitevents+0x634) [0x55b280]
2015-08-27 08:07:31 /lib64/libpthread.so.0() [0x3588c079d1]
2015-08-27 08:07:31 /lib64/libc.so.6(clone+0x6d) [0x35888e89dd]