Re: BUG #16293: postgres segfaults and returns SQLSTATE 08006

Daniel WM <dwilches(at)gmail(dot)com> writes:
> I have finally isolated the issue and I have a set of steps that reliably
> cause the segfault:

Interesting. I do *not* see a crash in v12 or HEAD, but v11 gives
me an assertion failure:

TRAP: FailedAssertion("!(!slot->tts_fixedTupleDescriptor)", File: "execTuples.c", Line: 284)
2020-03-14 17:16:06.626 EDT [1101] LOG: server process (PID 20822) was terminated by signal 6: Aborted
2020-03-14 17:16:06.626 EDT [1101] DETAIL: Failed process was running: INSERT INTO parent_table VALUES ('2020-02-02 01:00:00+00:00', 'f');

here:

#3 0x000000000063ef45 in ExecSetSlotDescriptor (slot=0x1cf4060,
tupdesc=0x7f903a2dd0f8) at execTuples.c:284
#4 0x00000000006360eb in ExecConstraints (resultRelInfo=0x1cf47b8,
slot=0x1cf4060, estate=0x1cf3778) at execMain.c:2062
#5 0x000000000065a44d in ExecInsert (mtstate=0x1cf3ae0, slot=0x1cf4060,
planSlot=0x1cf4060, estate=0x1cf3778, canSetTag=true)
at nodeModifyTable.c:398
#6 0x000000000065b80b in ExecModifyTable (pstate=<value optimized out>)
at nodeModifyTable.c:2159
#7 0x0000000000636c27 in ExecProcNode (queryDesc=0x1ce51e8,
direction=<value optimized out>, count=0, execute_once=224)
at ../../../src/include/executor/executor.h:247
#8 ExecutePlan (queryDesc=0x1ce51e8, direction=<value optimized out>,
count=0, execute_once=224) at execMain.c:1723
#9 standard_ExecutorRun (queryDesc=0x1ce51e8,
direction=<value optimized out>, count=0, execute_once=224)

So this looks like something to do with Andres' tupletableslot work.

regards, tom lane