pt-upgrade fails when query including format strings and SQL errors is given

SELECT '%s', A

pt-upgrade $RAW_LOG_FILE h=$HOST1,u=$USER1,p=$PASS1 h=$HOST2,u=$USER2,p=$PASS2 --type rawlog

> pt-upgrade debug.sql h=127.0.0.1,p=root,u=mysql h=127.0.0.1,p=root,u=mysql --type rawlog

#-----------------------------------------------------------------------
# Logs
#-----------------------------------------------------------------------

File: debug.sql
Size: 15

#-----------------------------------------------------------------------
# Hosts
#-----------------------------------------------------------------------

host1:

  DSN:       h=127.0.0.1
  hostname:  09919a165973
  MySQL:     MySQL Community Server (GPL) 5.7.28

host2:

  DSN:       h=127.0.0.1
  hostname:  09919a165973
  MySQL:     MySQL Community Server (GPL) 5.7.28

########################################################################
# Query class 56A6741F24C4C3EF
########################################################################

Reporting class because it has SQL errors, but hasn't been reported yet.

Total queries      1
Unique queries     1
Discarded queries  0

select ?, a

##
## SQL errors: 1
##

-- 1.
$VAR1 = {
  discarded => 0,
  errors => [],
  failures => [
    [
      'SELECT \'%s\', A',
      'DBD::mysql::st execute failed: Unknown column \'A\' in \'field list\' [for Statement "SELECT \'%s\', A"]',
      'DBD::mysql::st execute failed: Unknown column \'A\' in \'field list\' [for Statement "SELECT \'%s\', A"]'
    ]
  ],
  fingerprint => 'select ?, a',
  id => '56A6741F24C4C3EF',
  query_time_diffs => [],
  row_diffs => [],
  total_queries => 1,
  unique_queries => {
    'SELECT \'%s\', A' => 1
  },
  warning_diffs => []
};
Error reporting query class 56A6741F24C4C3EF: Missing argument in printf at /usr/local/Cellar/percona-toolkit/3.2.0/libexec/bin/pt-upgrade line 6162.

#-----------------------------------------------------------------------
# Stats
#-----------------------------------------------------------------------

failed_queries        1
not_select            0
queries_filtered      0
queries_no_diffs      0
queries_read          1
queries_with_diffs    0
queries_with_errors   0