UPDATE on Domain Array that is based on a composite key crashes

Hi hackers,

I couldn’t find a similar report to this one, so starting a new thread. I can reproduce this on v14.0 as well as PostgreSQL 12.5 (not tried below versions).

Steps to reproduce:

CREATE TYPE two_ints as (if1 int, if2 int);
CREATE DOMAIN domain AS two_ints CHECK ((VALUE).if1 > 0);
CREATE TABLE domain_indirection_test (f1 int, f3 domain, domain_array domain[]);
INSERT INTO domain_indirection_test (f1,f3.if1) VALUES (0, 1);
UPDATE domain_indirection_test SET domain_array[0].if2 = 5;
server closed the connection unexpectedly
This probably means the server terminated abnormally
before or while processing the request.
The connection to the server was lost. Attempting reset: Failed.
Time: 3.990 ms
@:-!>

The backtrace on PG 12.5 (As far as I remember, PG14 looks very similar) :

(lldb) bt
* thread #1, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=1, address=0x0)
* frame #0: 0x00000001036584b7 postgres`pg_detoast_datum(datum=0x0000000000000000) at fmgr.c:1741:6
frame #1: 0x0000000103439a86 postgres`ExecEvalFieldStoreDeForm(state=<unavailable>, op=0x00007f9212045df8, econtext=<unavailable>) at execExprInterp.c:3025:12
frame #2: 0x000000010343834e postgres`ExecInterpExpr(state=<unavailable>, econtext=<unavailable>, isnull=0x00007ffeec91fdc7) at execExprInterp.c:1337:4
frame #3: 0x000000010343742b postgres`ExecInterpExprStillValid(state=0x00007f921181db18, econtext=0x00007f921181d670, isNull=<unavailable>) at execExprInterp.c:1778:9
frame #4: 0x0000000103444e0d postgres`ExecEvalExprSwitchContext(state=0x00007f921181db18, econtext=0x00007f921181d670, isNull=<unavailable>) at executor.h:310:13
frame #5: 0x0000000103444cf0 postgres`ExecProject(projInfo=0x00007f921181db10) at executor.h:344:9
frame #6: 0x0000000103444af6 postgres`ExecScan(node=0x00007f921181d560, accessMtd=(postgres`SeqNext at nodeSeqscan.c:51), recheckMtd=(postgres`SeqRecheck at nodeSeqscan.c:90)) at execScan.c:239:12
frame #7: 0x0000000103461d17 postgres`ExecSeqScan(pstate=<unavailable>) at nodeSeqscan.c:112:9
frame #8: 0x000000010344375c postgres`ExecProcNodeFirst(node=0x00007f921181d560) at execProcnode.c:445:9
frame #9: 0x000000010345eefe postgres`ExecProcNode(node=0x00007f921181d560) at executor.h:242:9
frame #10: 0x000000010345e74f postgres`ExecModifyTable(pstate=0x00007f921181d090) at nodeModifyTable.c:2079:14
frame #11: 0x000000010344375c postgres`ExecProcNodeFirst(node=0x00007f921181d090) at execProcnode.c:445:9
frame #12: 0x000000010343f25e postgres`ExecProcNode(node=0x00007f921181d090) at executor.h:242:9
frame #13: 0x000000010343d80d postgres`ExecutePlan(estate=0x00007f921181cd10, planstate=0x00007f921181d090, use_parallel_mode=<unavailable>, operation=CMD_UPDATE, sendTuples=false, numberTuples=0, direction=ForwardScanDirection, dest=0x00007f9211818c38, execute_once=<unavailable>) at execMain.c:1646:10
frame #14: 0x000000010343d745 postgres`standard_ExecutorRun(queryDesc=0x00007f921180e310, direction=ForwardScanDirection, count=0, execute_once=true) at execMain.c:364:3
frame #15: 0x000000010343d67c postgres`ExecutorRun(queryDesc=0x00007f921180e310, direction=ForwardScanDirection, count=0, execute_once=<unavailable>) at execMain.c:308:3
frame #16: 0x00000001035784a8 postgres`ProcessQuery(plan=<unavailable>, sourceText=<unavailable>, params=<unavailable>, queryEnv=0x0000000000000000, dest=<unavailable>, completionTag="") at pquery.c:161:2
frame #17: 0x0000000103577c5e postgres`PortalRunMulti(portal=0x00007f9215024110, isTopLevel=true, setHoldSnapshot=false, dest=0x00007f9211818c38, altdest=0x00007f9211818c38, completionTag="") at pquery.c:0
frame #18: 0x000000010357763d postgres`PortalRun(portal=0x00007f9215024110, count=9223372036854775807, isTopLevel=<unavailable>, run_once=<unavailable>, dest=0x00007f9211818c38, altdest=0x00007f9211818c38, completionTag="") at pquery.c:796:5
frame #19: 0x0000000103574f87 postgres`exec_simple_query(query_string="UPDATE domain_indirection_test SET domain_array[0].if2 = 5;") at postgres.c:1215:10
frame #20: 0x00000001035746b8 postgres`PostgresMain(argc=<unavailable>, argv=<unavailable>, dbname=<unavailable>, username=<unavailable>) at postgres.c:0
frame #21: 0x000000010350d712 postgres`BackendRun(port=<unavailable>) at postmaster.c:4494:2
frame #22: 0x000000010350cffa postgres`BackendStartup(port=<unavailable>) at postmaster.c:4177:3
frame #23: 0x000000010350c59c postgres`ServerLoop at postmaster.c:1725:7
frame #24: 0x000000010350ac8d postgres`PostmasterMain(argc=3, argv=0x00007f9210d049c0) at postmaster.c:1398:11
frame #25: 0x000000010347fbdd postgres`main(argc=<unavailable>, argv=<unavailable>) at main.c:228:3
frame #26: 0x00007fff204e8f3d libdyld.dylib`start + 1

Thanks,
Onder KALACI
Software Engineer at Microsoft &
Developing the Citus database extension for PostgreSQL