Re: BUG #16036: Segmentation fault while doing an update

Got normal backtrace:

#0  GetMemoryChunkContext (pointer=0x0) at ./build/../src/include/utils/memutils.h:127
#1  pfree (pointer=0x0) at ./build/../src/backend/utils/mmgr/mcxt.c:1033
#2  0x0000564c3f007aca in heap_freetuple (htup=<optimized out>) at
./build/../src/backend/access/common/heaptuple.c:1340
#3  0x0000564c3f1b5889 in tts_buffer_heap_clear (slot=0x564c40650298) at
./build/../src/backend/executor/execTuples.c:652
#4  0x0000564c3f1b5cbe in ExecClearTuple (slot=0x564c40650298) at ./build/../src/include/executor/tuptable.h:428
#5  ExecResetTupleTable (tupleTable=0x564c4068a6b0, shouldFree=false) at
./build/../src/backend/executor/execTuples.c:1165
#6  0x0000564c3f1abc40 in ExecEndPlan (estate=0x564c40689740, planstate=<optimized out>) at
./build/../src/backend/executor/execMain.c:1560
#7  standard_ExecutorEnd (queryDesc=0x564c40663d80) at ./build/../src/backend/executor/execMain.c:496
#8  0x0000564c3f30a6e8 in ProcessQuery (plan=<optimized out>, sourceText=0x564c40663c60 "update tracking.test_session
setlist_position = list_position + 1 where id = $1", params=0x564c40663cf0, queryEnv=0x0, dest=0x564c3f8b1c00
<donothingDR>,
    completionTag=0x7ffd3557c720 "UPDATE 0") at ./build/../src/backend/tcop/pquery.c:204
#9  0x0000564c3f30a8c3 in PortalRunMulti (portal=portal@entry=0x564c405cb3b0, isTopLevel=isTopLevel@entry=true,
setHoldSnapshot=setHoldSnapshot@entry=false,dest=0x564c3f8b1c00 <donothingDR>, dest@entry=0x564c4052dc90,
altdest=0x564c3f8b1c00<donothingDR>, 
    altdest@entry=0x564c4052dc90, completionTag=completionTag@entry=0x7ffd3557c720 "UPDATE 0") at
./build/../src/backend/tcop/pquery.c:1283
#10 0x0000564c3f30b4db in PortalRun (portal=portal@entry=0x564c405cb3b0, count=count@entry=9223372036854775807,
isTopLevel=isTopLevel@entry=true,run_once=<optimized out>, dest=dest@entry=0x564c4052dc90,
altdest=altdest@entry=0x564c4052dc90,
    completionTag=0x7ffd3557c720 "UPDATE 0") at ./build/../src/backend/tcop/pquery.c:796
#11 0x0000564c3f308d05 in exec_execute_message (max_rows=9223372036854775807, portal_name=0x564c4052d880 "") at
./build/../src/backend/tcop/postgres.c:2090
#12 PostgresMain (argc=<optimized out>, argv=argv@entry=0x564c40578e80, dbname=<optimized out>, username=<optimized
out>)at ./build/../src/backend/tcop/postgres.c:4297 
#13 0x0000564c3effcbe1 in BackendRun (port=0x564c40574ba0, port=0x564c40574ba0) at
./build/../src/backend/postmaster/postmaster.c:4431
#14 BackendStartup (port=0x564c40574ba0) at ./build/../src/backend/postmaster/postmaster.c:4122
#15 ServerLoop () at ./build/../src/backend/postmaster/postmaster.c:1704
#16 0x0000564c3f28fe81 in PostmasterMain (argc=5, argv=0x564c40524b70) at
./build/../src/backend/postmaster/postmaster.c:1377
#17 0x0000564c3effdea8 in main (argc=5, argv=0x564c40524b70) at ./build/../src/backend/main/main.c:228

> 4 окт. 2019 г., в 3:29, PG Bug reporting form <noreply@postgresql.org> написал(а):
>
> The following bug has been logged on the website:
>
> Bug reference:      16036
> Logged by:          Антон Власов
> Email address:      druidvav@gmail.com
> PostgreSQL version: 12.0
> Operating system:   PostgreSQL 12.0 (Debian 12.0-1.pgdg90+1) on x86_64
> Description:
>
> I am having segmentation fault like this:
>
> 2019-10-04 02:30:02 MSK [16919-6] LOG:  server process (PID 18415) was
> terminated by signal 11: Segmentation fault
> 2019-10-04 02:30:02 MSK [16919-7] DETAIL:  Failed process was running:
> update tracking.test_session set list_position = list_position + 1 where id
> = $1
> 2019-10-04 02:30:02 MSK [16919-8] LOG:  terminating any other active server
> processes
>
> When there are several queries running simultaneously. Tried to get some
> info from coredump, but that's all i have:
>
> (gdb) bt
> #0  GetMemoryChunkContext (pointer=0x0) at
> ./build/../src/include/utils/memutils.h:127
> #1  pfree (pointer=0x0) at ./build/../src/backend/utils/mmgr/mcxt.c:1033
> Backtrace stopped: Cannot access memory at address 0x7ffc990e7218
>