Re: BUG #17054: Memory corruption in logical replication worker when replicating into partitioned table

PG Bug reporting form <noreply@postgresql.org> writes:
> When logical replication target is a partitioned table then execution of any
> DDL on source table leads to crash of target (subscriber) server.

Thanks for the report!  I duplicated the crash on v13 branch tip,
although it's hitting an assertion failure before reaching any segfault:

#2  0x00000000008f466a in ExceptionalCondition (
    conditionName=conditionName@entry=0xa5eae0 "natts == rel->attrmap->maplen", errorType=errorType@entry=0x948cc9
"FailedAssertion", 
    fileName=fileName@entry=0xa52956 "worker.c",
    lineNumber=lineNumber@entry=490) at assert.c:67
#3  0x0000000000777741 in slot_modify_cstrings (slot=slot@entry=0x2ec6e40,
    srcslot=<optimized out>, rel=rel@entry=0x2eca918,
    values=values@entry=0x7fffb3506480, replaces=replaces@entry=0x7fffb3509880)
    at worker.c:490
#4  0x00000000007785e7 in apply_handle_tuple_routing (
    edata=edata@entry=0x2ea45a0, remoteslot=remoteslot@entry=0x2ea48a0,
    newtup=newtup@entry=0x7fffb3506480, operation=operation@entry=CMD_UPDATE)
    at worker.c:1153
#5  0x0000000000778e74 in apply_handle_update (s=s@entry=0x7fffb3509fa0)
    at worker.c:846
#6  0x000000000077963c in apply_dispatch (s=0x7fffb3509fa0) at worker.c:1415
#7  LogicalRepApplyLoop (last_received=254887792) at worker.c:1624
#8  ApplyWorkerMain (main_arg=<optimized out>) at worker.c:2171
#9  0x0000000000743ec9 in StartBackgroundWorker () at bgworker.c:890

Interestingly, the same test case does NOT crash for me on master.
So apparently we fixed something that should have been back-patched.

            regards, tom lane