fairywren hung in pg_basebackup tests

fairywren (msys2 animal) is currently hung in the pg_basebackup tests.
Here's the bottom of the regress log. I don't have further info as yet,
but can dig is someone has a suggestion.

### Starting node "main"
# Running: pg_ctl -w -D
C:/tools/nmsys64/home/pgrunner/bf/root/REL_15_STABLE/pgsql.build/src/bin/pg_basebackup/tmp_check/t_010_pg_basebackup_main_data/pgdata
-l
C:/tools/nmsys64/home/pgrunner/bf/root/REL_15_STABLE/pgsql.build/src/bin/pg_basebackup/tmp_check/log/010_pg_basebackup_main.log
-o --cluster-name=main start
waiting for server to start.... done
server started
# Postmaster PID for node "main" is 5368
Junction created for C:\tools\nmsys64\tmp\pIBOsSp9se\tempdir <<===>>
C:\tools\nmsys64\home\pgrunner\bf\root\REL_15_STABLE\pgsql.build\src\bin\pg_basebackup\tmp_check\tmp_test_jVCb
# Taking pg_basebackup tarbackup2 from node "main"
# Running: pg_basebackup -D
C:/tools/nmsys64/home/pgrunner/bf/root/REL_15_STABLE/pgsql.build/src/bin/pg_basebackup/tmp_check/t_010_pg_basebackup_main_data/backup/tarbackup2
-h 127.0.0.1 -p 52897 --checkpoint fast --no-sync -Ft
# Backup finished
[13:11:33.592](0.978s) ok 95 - backup tar was created
[13:11:33.592](0.000s) ok 96 - WAL tar was created
[13:11:33.593](0.000s) not ok 97 - one tablespace tar was created
[13:11:33.593](0.000s)
[13:11:33.593](0.000s) #   Failed test 'one tablespace tar was created'
#   at t/010_pg_basebackup.pl line 352.
[13:11:33.593](0.000s) #          got: '0'
#     expected: '1'
# Checking port 52898
# Found port 52898
Name: replica
Data directory:
C:/tools/nmsys64/home/pgrunner/bf/root/REL_15_STABLE/pgsql.build/src/bin/pg_basebackup/tmp_check/t_010_pg_basebackup_replica_data/pgdata
Backup directory:
C:/tools/nmsys64/home/pgrunner/bf/root/REL_15_STABLE/pgsql.build/src/bin/pg_basebackup/tmp_check/t_010_pg_basebackup_replica_data/backup
Archive directory:
C:/tools/nmsys64/home/pgrunner/bf/root/REL_15_STABLE/pgsql.build/src/bin/pg_basebackup/tmp_check/t_010_pg_basebackup_replica_data/archives
Connection string: port=52898 host=127.0.0.1
Log file:
C:/tools/nmsys64/home/pgrunner/bf/root/REL_15_STABLE/pgsql.build/src/bin/pg_basebackup/tmp_check/log/010_pg_basebackup_replica.log
# Initializing node "replica" from backup "tarbackup2" of node "main"
# Running: C:/Windows/System32/tar xf
C:/tools/nmsys64/home/pgrunner/bf/root/REL_15_STABLE/pgsql.build/src/bin/pg_basebackup/tmp_check/t_010_pg_basebackup_main_data/backup/tarbackup2/base.tar
-C
C:/tools/nmsys64/home/pgrunner/bf/root/REL_15_STABLE/pgsql.build/src/bin/pg_basebackup/tmp_check/t_010_pg_basebackup_replica_data/pgdata
# Running: C:/Windows/System32/tar xf
C:/tools/nmsys64/home/pgrunner/bf/root/REL_15_STABLE/pgsql.build/src/bin/pg_basebackup/tmp_check/t_010_pg_basebackup_main_data/backup/tarbackup2/pg_wal.tar
-C
C:/tools/nmsys64/home/pgrunner/bf/root/REL_15_STABLE/pgsql.build/src/bin/pg_basebackup/tmp_check/t_010_pg_basebackup_replica_data/pgdata/pg_wal
Use of uninitialized value $_[2] in join or string at
C:\tools\nmsys64\home\pgrunner\bf\root\REL_15_STABLE\pgsql\src\test\perl/PostgreSQL/Test/Utils.pm
line 337.
# Running: C:/Windows/System32/tar xf  -C
C:\tools\nmsys64\home\pgrunner\bf\root\REL_15_STABLE\pgsql.build\src\bin\pg_basebackup\tmp_check\tmp_test_jVCb/tblspc1replica
Use of uninitialized value $_[2] in system at
C:\tools\nmsys64\home\pgrunner\bf\root\REL_15_STABLE\pgsql\src\test\perl/PostgreSQL/Test/Utils.pm
line 338.

cheers

andrew

--
Andrew Dunstan
EDB: https://www.enterprisedb.com