[sqlsmith] Parallel worker executor crash on master

Hi,

sqlsmith just crashed a parallel worker while testing master at
699bf7d05c.  I can reproduce it with the following recipe on a fresh
regression database.  Backtrace and query plan below as well.

regards,
Andreas

--8<---------------cut here---------------start------------->8---
set min_parallel_table_scan_size = '8kB';
set parallel_setup_cost = 0;
set parallel_tuple_cost = 0;

select *
      from
    public.prt1_m_p3 as ref_3
        inner join pg_catalog.pg_class as sample_1 tablesample bernoulli (2.1)
        on (ref_3.c = sample_1.relpages )
      inner join public.rtest_view4 as ref_4
      on (ref_4.b @@ (select keyword from public.test_tsquery limit 1 offset 2)
        ),
    lateral (select
          ref_3.a as c0
        from
          public.lseg_tbl as ref_5
        where (select f1 from public.timetz_tbl limit 1 offset 5)
         > (select pg_catalog.min(timetzcol) from public.brintest)
        limit 18) as subq_2
      where true
      limit 102;
--8<---------------cut here---------------end--------------->8---


                                                QUERY PLAN
-----------------------------------------------------------------------------------------------------------
 Limit  (cost=107.69..1421.69 rows=102 width=315)
   InitPlan 1 (returns $1)
     ->  Limit  (cost=0.35..0.52 rows=1 width=32)
           ->  Gather  (cost=0.00..1.04 rows=6 width=32)
                 Workers Planned: 1
                 ->  Parallel Seq Scan on test_tsquery  (cost=0.00..1.04 rows=4 width=32)
   ->  Nested Loop  (cost=107.17..5775.39 rows=440 width=315)
         Join Filter: (ref_3.c = sample_1.relpages)
         ->  Nested Loop  (cost=107.17..5416.40 rows=250 width=16)
               ->  Gather  (cost=0.00..1.29 rows=50 width=12)
                     Workers Planned: 1
                     ->  Parallel Seq Scan on prt1_m_p3 ref_3  (cost=0.00..1.29 rows=29 width=12)
               ->  Limit  (cost=107.17..108.20 rows=5 width=4)
                     InitPlan 2 (returns $4)
                       ->  Limit  (cost=0.45..0.54 rows=1 width=12)
                             ->  Gather  (cost=0.00..1.07 rows=12 width=12)
                                   Workers Planned: 1
                                   ->  Parallel Seq Scan on timetz_tbl  (cost=0.00..1.07 rows=7 width=12)
                     InitPlan 3 (returns $5)
                       ->  Aggregate  (cost=106.62..106.64 rows=1 width=12)
                             ->  Seq Scan on brintest  (cost=0.00..106.30 rows=130 width=12)
                     ->  Gather  (cost=0.00..1.03 rows=5 width=4)
                           Workers Planned: 1
                           Params Evaluated: $4, $5
                           ->  Result  (cost=0.00..1.03 rows=3 width=0)
                                 One-Time Filter: ($4 > $5)
                                 ->  Parallel Seq Scan on lseg_tbl ref_5  (cost=0.00..1.03 rows=3 width=0)
         ->  Materialize  (cost=0.00..194.10 rows=44 width=299)
               ->  Nested Loop  (cost=0.00..193.88 rows=44 width=299)
                     ->  Gather  (cost=0.00..140.00 rows=1 width=40)
                           Workers Planned: 2
                           Params Evaluated: $1
                           ->  Parallel Seq Scan on rtest_view4 ref_4  (cost=0.00..140.00 rows=1 width=40)
                                 Filter: (b @@ $1)
                     ->  Sample Scan on pg_class sample_1  (cost=0.00..53.44 rows=44 width=259)
                           Sampling: bernoulli ('2.1'::real)


Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x000055c9dba2d7f8 in timetz_gt (fcinfo=0x55c9dd7295a0) at date.c:2183
2183        TimeTzADT  *time2 = PG_GETARG_TIMETZADT_P(1);
#1  0x000055c9db8ae8b2 in ExecInterpExpr (state=0x55c9dd729f00, econtext=0x55c9dd7299b8, isnull=<optimized out>) at
execExprInterp.c:692
#2  0x000055c9db8d6753 in ExecEvalExprSwitchContext (isNull=0x7ffd2f99e55f "", econtext=0x55c9dd7299b8,
state=<optimizedout>) at ../../../src/include/executor/executor.h:300
 
#3  ExecQual (econtext=0x55c9dd7299b8, state=<optimized out>) at ../../../src/include/executor/executor.h:369
#4  ExecResult (pstate=0x55c9dd729c38) at nodeResult.c:84
#5  0x000055c9db8b21ea in ExecProcNode (node=0x55c9dd729c38) at ../../../src/include/executor/executor.h:242
#6  ExecutePlan (execute_once=<optimized out>, dest=0x55c9dd6fff78, direction=<optimized out>, numberTuples=18,
sendTuples=<optimizedout>, operation=CMD_SELECT, use_parallel_mode=<optimized out>, planstate=0x55c9dd729c38,
estate=0x55c9dd729118)at execMain.c:1718
 
#7  standard_ExecutorRun (queryDesc=0x55c9dd742b48, direction=<optimized out>, count=18, execute_once=<optimized out>)
atexecMain.c:361
 
#8  0x000055c9db8b6e99 in ParallelQueryMain (seg=0x55c9dd6a8ea8, toc=0x7f9109496000) at execParallel.c:1294
#9  0x000055c9db7911d9 in ParallelWorkerMain (main_arg=<optimized out>) at parallel.c:1150
#10 0x000055c9db975a63 in StartBackgroundWorker () at bgworker.c:841
#11 0x000055c9db982015 in do_start_bgworker (rw=0x55c9dd6a0380) at postmaster.c:5741
#12 maybe_start_bgworkers () at postmaster.c:5954
#13 0x000055c9db982ae8 in sigusr1_handler (postgres_signal_arg=<optimized out>) at postmaster.c:5134
#14 <signal handler called>
#15 0x00007f91088503d3 in select () from /lib/x86_64-linux-gnu/libc.so.6
#16 0x000055c9db7024ed in ServerLoop () at postmaster.c:1721
#17 0x000055c9db984194 in PostmasterMain (argc=3, argv=0x55c9dd67a5a0) at postmaster.c:1365
#18 0x000055c9db70448d in main (argc=3, argv=0x55c9dd67a5a0) at main.c:228