BUG #17362: Error "could not find block containing chunk" when using index with icu collation on CentOS 7 - Mailing list pgsql-bugs

The following bug has been logged on the website:

Bug reference:      17362
Logged by:          Pasi Eronen
Email address:      eronenp@gmail.com
PostgreSQL version: 14.1
Operating system:   CentOS 7
Description:

When I query a table containing certain Unicode data, using an index that
has certain collation, I get error message "could not find block containing
chunk". This is fully reproducible on CentOS 7 using the official RPM. (I
could not reproduce this on Oracle Linux 8, though):

Installing PostgreSQL on new CentOS 7 VM:

vagrant init centos/7
vagrant up
vagrant ssh
sudo -i
yum update -y
yum install -y
https://download.postgresql.org/pub/repos/yum/reporpms/EL-7-x86_64/pgdg-redhat-repo-latest.noarch.rpm
yum install -y postgresql14-server
su - postgres
cd /var/lib/pgsql
/usr/pgsql-14/bin/initdb data
/usr/pgsql-14/bin/pg_ctl -D data -l postgres.log start

Populating data (bad_strings_data.sql contains non-ASCII characters, so
using base64 here to ensure they don't get modified in this bug report):

/usr/pgsql-14/bin/psql 
postgres=# CREATE TABLE public.bad_strings (id uuid, value text);
postgres=# CREATE INDEX bad_strings_lower_idx ON public.bad_strings USING
btree (lower((value COLLATE "fi-FI-x-icu")));
base64 -d <<EOF | gunzip > /tmp/bad_strings_data.sql 
H4sIAN9Z3WEAA+2dy45lW3aW27GeouSWQczyvF+EsQQGm5uxZS6SBRKaV1PCLlsu24InoEcbuYOB
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EOF
/usr/pgsql-14/bin/psql < /tmp/bad_strings_data.sql

Query (using enable_seqscan=off to force index scan):

/usr/pgsql-14/bin/psql 
postgres=# set enable_seqscan=off;
postgres=# \set VERBOSITY verbose
postgres=# select id from bad_strings order by lower(value collate
"fi-FI-x-icu") asc, id;
ERROR:  XX000: could not find block containing chunk 0x20c2398
LOCATION:  AllocSetFree, aset.c:1026

The version I'm using:

postgres=# select version();
PostgreSQL 14.1 on x86_64-pc-linux-gnu, compiled by gcc (GCC) 4.8.5 20150623
(Red Hat 4.8.5-44), 64-bit

# rpm -qa | egrep 'icu|postgresql'
postgresql14-server-14.1-1PGDG.rhel7.x86_64
libicu-50.2-4.el7_7.x86_64
postgresql14-14.1-1PGDG.rhel7.x86_64
postgresql14-libs-14.1-1PGDG.rhel7.x86_64

Stack trace from "errfinish" (using a version compiled from
postgresql14-14.1-1PGDG.rhel7.src.rpm)

(gdb) bt
#0  errfinish (filename=filename@entry=0xa857b3 "aset.c",
lineno=lineno@entry=1026, funcname=funcname@entry=0xa857c0 <__func__.6365>
"AllocSetFree") at elog.c:514
#1  0x0000000000902b19 in AllocSetFree (context=<optimized out>,
pointer=0x254e4b8) at aset.c:1026
#2  0x00000000008b4728 in varstrfastcmp_locale (a1p=0x2550da9 "a", 'x'
<repeats 27 times>, len1=28, a2p=0x2550ad9 "axxxxxxx-\245w\256\245q\240g[",
'x' <repeats 14 times>, "@", 
    len2=<optimized out>, ssup=0x254c868, ssup=0x254c868) at
varlena.c:2425
#3  0x00000000008b47c6 in varlenafastcmp_locale (x=39128488, y=39127768,
ssup=0x254c868) at varlena.c:2280
#4  0x0000000000912f55 in ApplySortAbbrevFullComparator (ssup=0x254c868,
isNull2=<optimized out>, datum2=<optimized out>, isNull1=false,
datum1=<optimized out>)
    at ../../../../src/include/utils/sortsupport.h:262
#5  comparetup_heap (a=<optimized out>, b=<optimized out>, state=0x254c458)
at tuplesort.c:3791
#6  0x0000000000911d3b in qsort_tuple (data=<optimized out>, n=<optimized
out>, compare=0x912d70 <comparetup_heap>, arg=arg@entry=0x254c458)
    at ../../../../src/include/lib/sort_template.h:351
#7  0x0000000000913eb6 in tuplesort_sort_memtuples
(state=state@entry=0x254c458) at tuplesort.c:3566
#8  0x0000000000915be4 in tuplesort_performsort
(state=state@entry=0x254c458) at tuplesort.c:2061
#9  0x0000000000663dfe in ExecIncrementalSort (pstate=0x2535be0) at
nodeIncrementalSort.c:776
#10 0x0000000000642232 in ExecProcNode (node=0x2535be0) at
../../../src/include/executor/executor.h:257
#11 ExecutePlan (execute_once=<optimized out>, dest=0x253d238,
direction=<optimized out>, numberTuples=0, sendTuples=true,
operation=CMD_SELECT, 
    use_parallel_mode=<optimized out>, planstate=0x2535be0,
estate=0x25359b8) at execMain.c:1551
#12 standard_ExecutorRun (queryDesc=0x2540548, direction=<optimized out>,
count=0, execute_once=<optimized out>) at execMain.c:361
#13 0x00000000007b60fb in PortalRunSelect (portal=portal@entry=0x24de9f8,
forward=forward@entry=true, count=0, count@entry=9223372036854775807,
dest=dest@entry=0x253d238)
    at pquery.c:921
#14 0x00000000007b7587 in PortalRun (portal=portal@entry=0x24de9f8,
count=count@entry=9223372036854775807, isTopLevel=isTopLevel@entry=true,
run_once=run_once@entry=true, 
    dest=dest@entry=0x253d238, altdest=altdest@entry=0x253d238,
qc=qc@entry=0x7fffaf9db030) at pquery.c:765
#15 0x00000000007b3337 in exec_simple_query (query_string=0x247afb8 "select
id from bad_strings order by lower(value collate \"fi-FI-x-icu\") asc, id;")
at postgres.c:1214
#16 0x00000000007b47b3 in PostgresMain (argc=argc@entry=1,
argv=argv@entry=0x7fffaf9db400, dbname=0x24a6a08 "postgres",
username=<optimized out>) at postgres.c:4486
#17 0x000000000048cba5 in BackendRun (port=<optimized out>, port=<optimized
out>) at postmaster.c:4530
#18 BackendStartup (port=0x249e1d0) at postmaster.c:4252
#19 ServerLoop () at postmaster.c:1745
#20 0x0000000000731e32 in PostmasterMain (argc=argc@entry=3,
argv=argv@entry=0x2475b20) at postmaster.c:1417
#21 0x000000000048dcc2 in main (argc=3, argv=0x2475b20) at main.c:209

Best regards,
Pasi