tuplehash_start_iterate (tb=0x18, iter=iter@entry=0x2349340) at ../../../src/include/lib/simplehash.h:870
870		for (i = 0; i < tb->size; i++)
(gdb) bt
#0  tuplehash_start_iterate (tb=0x18, iter=iter@entry=0x2349340) at ../../../src/include/lib/simplehash.h:870
#1  0x0000000000654e49 in agg_retrieve_hash_table_in_memory (aggstate=0x23479e8) at nodeAgg.c:2664
#2  agg_retrieve_hash_table (aggstate=0x23479e8) at nodeAgg.c:2591
#3  0x000000000065588d in agg_retrieve_direct (aggstate=<optimized out>) at nodeAgg.c:2141
#4  ExecAgg (pstate=<optimized out>) at nodeAgg.c:2022
#5  0x0000000000648579 in ExecProcNodeInstr (node=0x23479e8) at execProcnode.c:460
#6  0x000000000064116b in ExecProcNode (node=0x23479e8) at ../../../src/include/executor/executor.h:245
#7  ExecutePlan (execute_once=<optimized out>, dest=0xa39c00 <donothingDR>, direction=<optimized out>, numberTuples=0, sendTuples=<optimized out>, operation=CMD_SELECT, use_parallel_mode=<optimized out>, planstate=0x23479e8, 
    estate=0x23477b0) at execMain.c:1646
#8  standard_ExecutorRun (queryDesc=0x2345d68, direction=<optimized out>, count=0, execute_once=<optimized out>) at execMain.c:364
#9  0x00000000005daea9 in ExplainOnePlan (plannedstmt=plannedstmt@entry=0x2345c50, into=into@entry=0x0, es=es@entry=0x2285690, queryString=queryString@entry=0x22617b0 "explain analyze select a, b, sum(c) from t2 group by cube (a,b);", 
    params=params@entry=0x0, queryEnv=queryEnv@entry=0x0, planduration=0x7ffdc444edc0) at explain.c:549
#10 0x00000000005db1d5 in ExplainOneQuery (queryEnv=0x0, params=0x0, queryString=0x22617b0 "explain analyze select a, b, sum(c) from t2 group by cube (a,b);", es=0x2285690, into=0x0, cursorOptions=<optimized out>, query=<optimized out>)
    at explain.c:385
#11 ExplainOneQuery (query=<optimized out>, cursorOptions=<optimized out>, into=0x0, es=0x2285690, queryString=0x22617b0 "explain analyze select a, b, sum(c) from t2 group by cube (a,b);", params=0x0, queryEnv=0x0) at explain.c:353
#12 0x00000000005db79e in ExplainQuery (pstate=pstate@entry=0x2283700, stmt=stmt@entry=0x2262bc0, params=params@entry=0x0, dest=dest@entry=0x22855f8) at ../../../src/include/nodes/nodes.h:590
#13 0x00000000007b47d3 in standard_ProcessUtility (pstmt=0x2262d38, queryString=0x22617b0 "explain analyze select a, b, sum(c) from t2 group by cube (a,b);", context=PROCESS_UTILITY_TOPLEVEL, params=0x0, queryEnv=0x0, dest=0x22855f8, 
    completionTag=0x7ffdc444ef60 "") at utility.c:836
#14 0x00000000007b1986 in PortalRunUtility (portal=0x22cf3f0, pstmt=0x2262d38, isTopLevel=<optimized out>, setHoldSnapshot=<optimized out>, dest=0x22855f8, completionTag=0x7ffdc444ef60 "") at pquery.c:1175
#15 0x00000000007b28b0 in FillPortalStore (portal=0x22cf3f0, isTopLevel=<optimized out>) at ../../../src/include/nodes/nodes.h:590
#16 0x00000000007b3405 in PortalRun (portal=portal@entry=0x22cf3f0, count=count@entry=9223372036854775807, isTopLevel=isTopLevel@entry=true, run_once=run_once@entry=true, dest=dest@entry=0x232ef00, altdest=altdest@entry=0x232ef00, 
    completionTag=0x7ffdc444f190 "") at pquery.c:765
#17 0x00000000007aee40 in exec_simple_query (query_string=0x22617b0 "explain analyze select a, b, sum(c) from t2 group by cube (a,b);") at postgres.c:1227
#18 0x00000000007b0903 in PostgresMain (argc=<optimized out>, argv=argv@entry=0x228f4b8, dbname=<optimized out>, username=<optimized out>) at postgres.c:4291
#19 0x000000000072f51e in BackendRun (port=0x2287140, port=0x2287140) at postmaster.c:4498
#20 BackendStartup (port=0x2287140) at postmaster.c:4189
#21 ServerLoop () at postmaster.c:1727
#22 0x0000000000730317 in PostmasterMain (argc=argc@entry=3, argv=argv@entry=0x225b390) at postmaster.c:1400
#23 0x000000000047e191 in main (argc=3, argv=0x225b390) at main.c:210