[sqlsmith] Failed assertion on pfree() via perform_pruning_combine_step

Hi,

testing with master at 039eb6e92f yielded another query triggering an
assertion.  Backtrace and query against the regression database below.

regards,
Andreas

#0  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51
#1  0x00007f25474cf42a in __GI_abort () at abort.c:89
#2  0x0000556c14b75bb3 in ExceptionalCondition (
    conditionName=conditionName@entry=0x556c14d11510 "!(((context) != ((void *)0) && (((((const
Node*)((context)))->type)== T_AllocSetContext) || ((((const Node*)((context)))->type) == T_SlabContext) || ((((const
Node*)((context)))->type)== T_Generatio"..., 
 
    errorType=errorType@entry=0x556c14bcac95 "BadArgument", 
    fileName=fileName@entry=0x556c14d11480 "../../../../src/include/utils/memutils.h",
lineNumber=lineNumber@entry=129)
    at assert.c:54
#3  0x0000556c14ba28cb in GetMemoryChunkContext (pointer=<optimized out>) at
../../../../src/include/utils/memutils.h:129
#4  pfree (pointer=<optimized out>) at mcxt.c:1033
#5  0x0000556c1495fc01 in bms_int_members (a=<optimized out>, b=<optimized out>) at bitmapset.c:917
#6  0x0000556c149d910a in perform_pruning_combine_step (context=0x7ffe80889b20, step_results=0x7f253e3efcc0,
cstep=0x7f253e3f13a0)
    at partprune.c:2697
#7  get_matching_partitions (context=0x7ffe80889b20, pruning_steps=<optimized out>) at partprune.c:317
#8  0x0000556c149d9596 in prune_append_rel_partitions (rel=rel@entry=0x7f253e3eb3e8) at partprune.c:262
#9  0x0000556c14989e21 in set_append_rel_size (rte=0x7f254819d810, rti=2, rel=0x7f253e3eb3e8, root=0x7f254819d3c8) at
allpaths.c:907
#10 set_rel_size (root=root@entry=0x7f254819d3c8, rel=rel@entry=0x7f253e3eb3e8, rti=rti@entry=2, rte=0x7f254819d810)
    at allpaths.c:341
#11 0x0000556c1498afad in set_base_rel_sizes (root=<optimized out>) at allpaths.c:281
#12 make_one_rel (root=root@entry=0x7f254819d3c8, joinlist=joinlist@entry=0x7f253e3f0100) at allpaths.c:179
#13 0x0000556c149abfac in query_planner (root=root@entry=0x7f254819d3c8, tlist=tlist@entry=0x7f25481afdc0, 
    qp_callback=qp_callback@entry=0x556c149acb90 <standard_qp_callback>, qp_extra=qp_extra@entry=0x7ffe80889dc0) at
planmain.c:259
#14 0x0000556c149b0be5 in grouping_planner (root=root@entry=0x7f254819d3c8,
inheritance_update=inheritance_update@entry=false,
 
    tuple_fraction=<optimized out>, tuple_fraction@entry=0) at planner.c:1914
#15 0x0000556c149b31a1 in subquery_planner (glob=<optimized out>, parse=parse@entry=0x556c16bf4c88, 
    parent_root=parent_root@entry=0x556c16bf6360, hasRecursion=hasRecursion@entry=false, tuple_fraction=<optimized
out>)
    at planner.c:984
#16 0x0000556c149899d3 in set_subquery_pathlist (rte=<optimized out>, rti=<optimized out>, rel=0x556c16c0f6a0,
root=0x556c16bf6360)
    at allpaths.c:2196
#17 set_rel_size (root=root@entry=0x556c16bf6360, rel=rel@entry=0x556c16c0eaf0, rti=rti@entry=2, rte=<optimized out>)
    at allpaths.c:379
#18 0x0000556c1498afad in set_base_rel_sizes (root=<optimized out>) at allpaths.c:281
#19 make_one_rel (root=root@entry=0x556c16bf6360, joinlist=joinlist@entry=0x556c16c0eda8) at allpaths.c:179
#20 0x0000556c149abfac in query_planner (root=root@entry=0x556c16bf6360, tlist=tlist@entry=0x556c16c0d928, 
    qp_callback=qp_callback@entry=0x556c149acb90 <standard_qp_callback>, qp_extra=qp_extra@entry=0x7ffe8088a200) at
planmain.c:259
#21 0x0000556c149b0be5 in grouping_planner (root=root@entry=0x556c16bf6360,
inheritance_update=inheritance_update@entry=false,
 
    tuple_fraction=<optimized out>, tuple_fraction@entry=0) at planner.c:1914
#22 0x0000556c149b31a1 in subquery_planner (glob=glob@entry=0x556c16bf5bf0, parse=parse@entry=0x556c16bf4da0, 
    parent_root=parent_root@entry=0x0, hasRecursion=hasRecursion@entry=false, tuple_fraction=tuple_fraction@entry=0)
    at planner.c:984
#23 0x0000556c149b4356 in standard_planner (parse=0x556c16bf4da0, cursorOptions=256, boundParams=<optimized out>) at
planner.c:405
#24 0x0000556c14a680dd in pg_plan_query (querytree=0x556c16bf4da0, cursorOptions=256, boundParams=0x0) at
postgres.c:808
#25 0x0000556c14a681be in pg_plan_queries (querytrees=<optimized out>, cursorOptions=cursorOptions@entry=256, 
    boundParams=boundParams@entry=0x0) at postgres.c:874
#26 0x0000556c14a686a9 in exec_simple_query ( query_string=0x556c16b2b438 "...") at postgres.c:1049
#27 0x0000556c14a6a341 in PostgresMain (argc=<optimized out>, argv=argv@entry=0x556c16b56ad8, dbname=<optimized out>, 
    username=<optimized out>) at postgres.c:4149
#28 0x0000556c1474eac4 in BackendRun (port=0x556c16b4c030) at postmaster.c:4409
#29 BackendStartup (port=0x556c16b4c030) at postmaster.c:4081
#30 ServerLoop () at postmaster.c:1754
#31 0x0000556c149ec017 in PostmasterMain (argc=3, argv=0x556c16b257d0) at postmaster.c:1362
#32 0x0000556c1475006d in main (argc=3, argv=0x556c16b257d0) at main.c:228

select
  sample_0.dd as c0,
  subq_1.c3 as c1,
  subq_1.c0 as c2,
  subq_1.c2 as c3,
  subq_1.c3 as c4,
  sample_0.bb as c5,
  subq_1.c0 as c6,
  pg_catalog.pg_current_wal_flush_lsn() as c7,
  public.func_with_bad_set() as c8,
  sample_0.bb as c9,
  sample_0.aa as c10,
  sample_0.dd as c11
from
  public.d as sample_0 tablesample bernoulli (2.8) ,
  lateral (select
    subq_0.c1 as c0,
    sample_0.aa as c1,
    subq_0.c0 as c2,
    sample_0.cc as c3,
    subq_0.c0 as c4,
    subq_0.c1 as c5
      from
    (select
          sample_1.a as c0,
          (select s from public.reloptions_test limit 1 offset 2)
         as c1
        from
          public.pagg_tab_ml as sample_1 tablesample system (3.6)
        where ((((select c from public.test_tbl3 limit 1 offset 2)
               <= cast(null as test_type3))
          or (((select n from testxmlschema.test2 limit 1 offset 1)
             <= true)
            or (sample_0.bb is not NULL)))
        and ((true)
          or ((cast(null as varbit) >= (select varbitcol from public.brintest limit 1 offset 3)
            )
            and ((select macaddrcol from public.brintest limit 1 offset 6)
             <> cast(null as macaddr)))))
          or ((sample_1.a is NULL)
        and ((sample_1.c is not NULL)
          or (sample_1.c is NULL)))) as subq_0
      where (select salary from public.rtest_emp limit 1 offset 3)
       = (select pg_catalog.min(newsal) from public.rtest_emplog)

      limit 13) as subq_1
where sample_0.aa is NULL
limit 140;