e.g., http://buildbot.mongodb.org/builders/Linux%2064-bit%20DUR%20ON/builds/564/steps/test/logs/stdio

m31101| Tue Jul 26 15:27:42 [conn4] creating profile collection: test.system.profile
m31101| Tue Jul 26 15:27:42 [conn4] Assertion: 13312:replSet error : logOp() but not primary?
m31101| 0x548589 0x6d5153 0x6ce5a2 0x733a42 0x720c39 0x7c137d 0x7b6c5b 0x7b72c3 0x78e7fa 0x7909f5 0x711c02 0x886787 0x5bab30 0x2b6b01c93971 0x2b6b0373192d
m31101| /home/yellow/buildslave/Linux_64bit_DUR_ON/mongo/mongod(_ZN5mongo11msgassertedEiPKc+0x119) [0x548589]
m31101| /home/yellow/buildslave/Linux_64bit_DUR_ON/mongo/mongod() [0x6d5153]
m31101| /home/yellow/buildslave/Linux_64bit_DUR_ON/mongo/mongod(_ZN5mongo5logOpEPKcS1_RKNS_7BSONObjEPS2_Pb+0x42) [0x6ce5a2]
m31101| /home/yellow/buildslave/Linux_64bit_DUR_ON/mongo/mongod(_ZN5mongo12userCreateNSEPKcNS_7BSONObjERSsbPb+0x372) [0x733a42]
m31101| /home/yellow/buildslave/Linux_64bit_DUR_ON/mongo/mongod(_ZN5mongo8Database17setProfilingLevelEiRSs+0x439) [0x720c39]
m31101| /home/yellow/buildslave/Linux_64bit_DUR_ON/mongo/mongod(_ZN5mongo10CmdProfile3runERKSsRNS_7BSONObjERSsRNS_14BSONObjBuilderEb+0x11d) [0x7c137d]
m31101| /home/yellow/buildslave/Linux_64bit_DUR_ON/mongo/mongod(_ZN5mongo11execCommandEPNS_7CommandERNS_6ClientEiPKcRNS_7BSONObjERNS_14BSONObjBuilderEb+0x86b) [0x7b6c5b]
m31101| /home/yellow/buildslave/Linux_64bit_DUR_ON/mongo/mongod(_ZN5mongo12_runCommandsEPKcRNS_7BSONObjERNS_11_BufBuilderINS_16TrivialAllocatorEEERNS_14BSONObjBuilderEbi+0x323) [0x7b72c3]
m31101| /home/yellow/buildslave/Linux_64bit_DUR_ON/mongo/mongod(_ZN5mongo11runCommandsEPKcRNS_7BSONObjERNS_5CurOpERNS_11_BufBuilderINS_16TrivialAllocatorEEERNS_14BSONObjBuilderEbi+0x3a) [0x78e7fa]
m31101| /home/yellow/buildslave/Linux_64bit_DUR_ON/mongo/mongod(ZN5mongo8runQueryERNS_7MessageERNS_12QueryMessageERNS_5CurOpES1+0xd45) [0x7909f5]
m31101| /home/yellow/buildslave/Linux_64bit_DUR_ON/mongo/mongod(_ZN5mongo16assembleResponseERNS_7MessageERNS_10DbResponseERKNS_11HostAndPortE+0xa92) [0x711c02]
m31101| /home/yellow/buildslave/Linux_64bit_DUR_ON/mongo/mongod(_ZN5mongo16MyMessageHandler7processERNS_7MessageEPNS_21AbstractMessagingPortEPNS_9LastErrorE+0xd7) [0x886787]
m31101| /home/yellow/buildslave/Linux_64bit_DUR_ON/mongo/mongod(_ZN5mongo3pms9threadRunEPNS_13MessagingPortE+0x260) [0x5bab30]
m31101| /lib/libpthread.so.0(+0x7971) [0x2b6b01c93971]
m31101| /lib/libc.so.6(clone+0x6d) [0x2b6b0373192d]
m31102| Tue Jul 26 15:27:42 [conn4] creating profile collection: test.system.profile
m31102| Tue Jul 26 15:27:42 [conn4] Assertion: 13312:replSet error : logOp() but not primary?
m31102| 0x548589 0x6d5153 0x6ce5a2 0x733a42 0x720c39 0x7c137d 0x7b6c5b 0x7b72c3 0x78e7fa 0x7909f5 0x711c02 0x886787 0x5bab30 0x2b4329f49971 0x2b432b9e792d
m31102| /home/yellow/buildslave/Linux_64bit_DUR_ON/mongo/mongod(_ZN5mongo11msgassertedEiPKc+0x119) [0x548589]
m31102| /home/yellow/buildslave/Linux_64bit_DUR_ON/mongo/mongod() [0x6d5153]
m31102| /home/yellow/buildslave/Linux_64bit_DUR_ON/mongo/mongod(_ZN5mongo5logOpEPKcS1_RKNS_7BSONObjEPS2_Pb+0x42) [0x6ce5a2]
m31102| /home/yellow/buildslave/Linux_64bit_DUR_ON/mongo/mongod(_ZN5mongo12userCreateNSEPKcNS_7BSONObjERSsbPb+0x372) [0x733a42]
m31102| /home/yellow/buildslave/Linux_64bit_DUR_ON/mongo/mongod(_ZN5mongo8Database17setProfilingLevelEiRSs+0x439) [0x720c39]
m31102| /home/yellow/buildslave/Linux_64bit_DUR_ON/mongo/mongod(_ZN5mongo10CmdProfile3runERKSsRNS_7BSONObjERSsRNS_14BSONObjBuilderEb+0x11d) [0x7c137d]
m31102| /home/yellow/buildslave/Linux_64bit_DUR_ON/mongo/mongod(_ZN5mongo11execCommandEPNS_7CommandERNS_6ClientEiPKcRNS_7BSONObjERNS_14BSONObjBuilderEb+0x86b) [0x7b6c5b]
m31102| /home/yellow/buildslave/Linux_64bit_DUR_ON/mongo/mongod(_ZN5mongo12_runCommandsEPKcRNS_7BSONObjERNS_11_BufBuilderINS_16TrivialAllocatorEEERNS_14BSONObjBuilderEbi+0x323) [0x7b72c3]
m31102| /home/yellow/buildslave/Linux_64bit_DUR_ON/mongo/mongod(_ZN5mongo11runCommandsEPKcRNS_7BSONObjERNS_5CurOpERNS_11_BufBuilderINS_16TrivialAllocatorEEERNS_14BSONObjBuilderEbi+0x3a) [0x78e7fa]
m31102| /home/yellow/buildslave/Linux_64bit_DUR_ON/mongo/mongod(ZN5mongo8runQueryERNS_7MessageERNS_12QueryMessageERNS_5CurOpES1+0xd45) [0x7909f5]
m31102| /home/yellow/buildslave/Linux_64bit_DUR_ON/mongo/mongod(_ZN5mongo16assembleResponseERNS_7MessageERNS_10DbResponseERKNS_11HostAndPortE+0xa92) [0x711c02]
m31102| /home/yellow/buildslave/Linux_64bit_DUR_ON/mongo/mongod(_ZN5mongo16MyMessageHandler7processERNS_7MessageEPNS_21AbstractMessagingPortEPNS_9LastErrorE+0xd7) [0x886787]
m31102| /home/yellow/buildslave/Linux_64bit_DUR_ON/mongo/mongod(_ZN5mongo3pms9threadRunEPNS_13MessagingPortE+0x260) [0x5bab30]
m31102| /lib/libpthread.so.0(+0x7971) [0x2b4329f49971]
m31102| /lib/libc.so.6(clone+0x6d) [0x2b432b9e792d]