Comment 2 for bug 1294259

#0 0x00007f81059a1925 in raise () from /lib64/libc.so.6
#1 0x00007f81059a3105 in abort () from /lib64/libc.so.6
#2 0x00007f81003cdc05 in base_size (this=0x1e97d58, trx=0x7f80c496c990) at galera/src/key_set.hpp:267
#3 serial_size (this=0x1e97d58, trx=0x7f80c496c990) at galera/src/key_set.hpp:282
#4 serial_size (this=0x1e97d58, trx=0x7f80c496c990) at galera/src/key_set.hpp:208
#5 serial_size (this=0x1e97d58, trx=0x7f80c496c990) at galera/src/key_set.hpp:212
#6 next_base<galera::KeySet::KeyPart> (this=0x1e97d58, trx=0x7f80c496c990) at galerautils/src/gu_rset.hpp:346
#7 next (this=0x1e97d58, trx=0x7f80c496c990) at galerautils/src/gu_rset.hpp:420
#8 next (this=0x1e97d58, trx=0x7f80c496c990) at galera/src/key_set.hpp:713
#9 galera::Certification::purge_for_trx_v3 (this=0x1e97d58, trx=0x7f80c496c990) at galera/src/certification.cpp:120
#10 0x00007f81003d6252 in galera::Certification::PurgeAndDiscard::operator() (this=0x7f80da9ddff0, vt=...) at galera/src/certification.hpp:140
#11 0x00007f81003d0911 in for_each<std::_Rb_tree_iterator<std::pair<long const, galera::TrxHandle*> >, galera::Certification::PurgeAndDiscard> (this=0x1e97d58, seqno=69757, handle_gcache=true)
    at /usr/include/c++/4.4.7/bits/stl_algo.h:4200
#12 galera::Certification::purge_trxs_upto_ (this=0x1e97d58, seqno=69757, handle_gcache=true) at galera/src/certification.cpp:937
#13 0x00007f81003fe858 in purge_trxs_upto (this=0x1e974c0, seq=69757, seqno_l=<value optimized out>) at galera/src/certification.hpp:75
#14 galera::ReplicatorSMM::process_commit_cut (this=0x1e974c0, seq=69757, seqno_l=<value optimized out>) at galera/src/replicator_smm.cpp:1247
#15 0x00007f81003dcbe5 in galera::GcsActionSource::dispatch (this=0x1e97aa8, recv_ctx=0x7f80d4000990, act=<value optimized out>, exit_loop=@0x7f80da9df04f) at galera/src/gcs_action_source.cpp:127
#16 0x00007f81003dd073 in galera::GcsActionSource::process (this=0x1e97aa8, recv_ctx=0x7f80d4000990, exit_loop=@0x7f80da9df04f) at galera/src/gcs_action_source.cpp:177
#17 0x00007f81003fb983 in galera::ReplicatorSMM::async_recv (this=0x1e974c0, recv_ctx=0x7f80d4000990) at galera/src/replicator_smm.cpp:354
#18 0x00007f8100410673 in galera_recv (gh=<value optimized out>, recv_ctx=<value optimized out>) at galera/src/wsrep_provider.cpp:226
#19 0x00000000005be0af in wsrep_replication_process (thd=0x7f80d4000990) at /usr/src/debug/Percona-XtraDB-Cluster-5.6.15/sql/wsrep_thd.cc:309
#20 0x00000000005ae4d0 in start_wsrep_THD (arg=0x5be060) at /usr/src/debug/Percona-XtraDB-Cluster-5.6.15/sql/mysqld.cc:5484
#21 0x00007f810754f9d1 in start_thread () from /lib64/libpthread.so.0
#22 0x00007f8105a57b6d in clone () from /lib64/libc.so.6