#0  0x00007f7403dedec7 in semop () from /lib/libc.so.6
#1  0x00007f7405b77d91 in PGSemaphoreLock (sema=0x7f73ff64b070, interruptOK=0 '\000') at pg_sema.c:421
#2  0x00007f7405bd4c37 in LWLockAcquireCommon (val=<optimized out>, valptr=<optimized out>, mode=<optimized out>, l=<optimized out>) at /tmp/buildd/postgresql-9.4-9.4.4/build/../src/backend/storage/lmgr/lwlock.c:626
#3  LWLockAcquireWithVar (l=0x7f70f2ab6980, valptr=<optimized out>, val=<optimized out>) at /tmp/buildd/postgresql-9.4-9.4.4/build/../src/backend/storage/lmgr/lwlock.c:478
#4  0x00007f7405a0e7c4 in WALInsertLockAcquire () at /tmp/buildd/postgresql-9.4-9.4.4/build/../src/backend/access/transam/xlog.c:1590
#5  XLogInsert (rmid=<optimized out>, info=<optimized out>, rdata=<optimized out>) at /tmp/buildd/postgresql-9.4-9.4.4/build/../src/backend/access/transam/xlog.c:1118
#6  0x00007f74059d3100 in log_heap_update (new_all_visible_cleared=<optimized out>, all_visible_cleared=<optimized out>, old_key_tuple=<optimized out>, newtup=<optimized out>, oldtup=<optimized out>, newbuf=<optimized out>, oldbuf=<optimized out>, reln=<optimized out>) at /tmp/buildd/postgresql-9.4-9.4.4/build/../src/backend/access/heap/heapam.c:6962
#7  heap_update (relation=<optimized out>, otid=<optimized out>, newtup=<optimized out>, cid=0, crosscheck=<optimized out>, wait=<optimized out>, hufd=0x7ffff1c22710, lockmode=0x7ffff1c2272c) at /tmp/buildd/postgresql-9.4-9.4.4/build/../src/backend/access/heap/heapam.c:3772
#8  0x00007f7405affa09 in ExecUpdate (canSetTag=<optimized out>, estate=<optimized out>, epqstate=<optimized out>, planSlot=<optimized out>, slot=<optimized out>, oldtuple=<optimized out>, tupleid=<optimized out>) at /tmp/buildd/postgresql-9.4-9.4.4/build/../src/backend/executor/nodeModifyTable.c:677
#9  ExecModifyTable (node=0x7f74079915a0) at /tmp/buildd/postgresql-9.4-9.4.4/build/../src/backend/executor/nodeModifyTable.c:1028
#10 0x00007f7405ae8058 in ExecProcNode (node=0x7f74079915a0) at /tmp/buildd/postgresql-9.4-9.4.4/build/../src/backend/executor/execProcnode.c:377
#11 0x00007f7405ae69f7 in ExecutePlan (dest=<optimized out>, direction=<optimized out>, numberTuples=<optimized out>, sendTuples=<optimized out>, operation=<optimized out>, planstate=<optimized out>, estate=<optimized out>) at /tmp/buildd/postgresql-9.4-9.4.4/build/../src/backend/executor/execMain.c:1490
#12 standard_ExecutorRun (queryDesc=0x7f7407990f70, direction=-238936144, count=0) at /tmp/buildd/postgresql-9.4-9.4.4/build/../src/backend/executor/execMain.c:319
#13 0x00007f7405be5eb4 in ProcessQuery (plan=0x7f7407976940, sourceText=0x7f740792eec0 "UPDATE reports SET last_attempt_ts='2015-07-20T09:35:04.375821+00:00'::timestamptz WHERE reports.id = '47356f8a2e9c11e5ad7d00163ecd2c00'", params=<optimized out>, dest=0x7f7407978548, completionTag=0x7ffff1c22a80 "") at /tmp/buildd/postgresql-9.4-9.4.4/build/../src/backend/tcop/pquery.c:185
#14 0x00007f7405be60ee in PortalRunMulti (portal=0x7f7407841580, isTopLevel=1 '\001', dest=<optimized out>, altdest=<optimized out>, completionTag=<optimized out>) at /tmp/buildd/postgresql-9.4-9.4.4/build/../src/backend/tcop/pquery.c:1279
#15 0x00007f7405be69bd in PortalRun (portal=<optimized out>, count=<optimized out>, isTopLevel=-80 '\260', dest=<optimized out>, altdest=<optimized out>, completionTag=<optimized out>) at /tmp/buildd/postgresql-9.4-9.4.4/build/../src/backend/tcop/pquery.c:816
#16 0x00007f7405be2b08 in exec_simple_query (query_string=<optimized out>) at /tmp/buildd/postgresql-9.4-9.4.4/build/../src/backend/tcop/postgres.c:1072
#17 0x00007f7405be4448 in PostgresMain (argc=<optimized out>, argv=<optimized out>, dbname=0x7f740780a718 "rsm_db", username=<optimized out>) at /tmp/buildd/postgresql-9.4-9.4.4/build/../src/backend/tcop/postgres.c:4074
#18 0x00007f7405b8c0f5 in BackendRun (port=<optimized out>) at /tmp/buildd/postgresql-9.4-9.4.4/build/../src/backend/postmaster/postmaster.c:4164
#19 BackendStartup (port=<optimized out>) at /tmp/buildd/postgresql-9.4-9.4.4/build/../src/backend/postmaster/postmaster.c:3829
#20 ServerLoop () at /tmp/buildd/postgresql-9.4-9.4.4/build/../src/backend/postmaster/postmaster.c:1597
#21 PostmasterMain (argc=<optimized out>, argv=<optimized out>) at /tmp/buildd/postgresql-9.4-9.4.4/build/../src/backend/postmaster/postmaster.c:1244
#22 0x00007f7405b1e474 in main (argc=5, argv=0x7f7407809910) at /tmp/buildd/postgresql-9.4-9.4.4/build/../src/backend/main/main.c:228
Detaching from program: /usr/lib/postgresql/9.4/bin/postgres, process 9506
