MTR aborts due to "Use of uninitialized value $report in concatenation"

main.create_drop_procedure               w6 [ pass ]     40

***Warnings generated in error logs during shutdown after running tests: compat/oracle.sp-cursor-rowtype funcs_1.is_statistics json.json_table_notembedded main.alter_table_combinations gcol.gcol_bug20746926 main.1st main.column_compression_utf16 main.cache_temporal_4265 main.alter_table_upgrade_myisam main.count_distinct funcs_1.is_columns_memory heap.drop client.mariadb-conv-utf8 gcol.gcol_non_stored_columns_myisam handler.disconnect_4480 gcol.gcol_view_myisam compat/oracle.func_time funcs_1.myisam_storedproc_02 funcs_1.is_schema_privileges_is_mysql_test main.comment_index funcs_1.myisam_trig_09 main.create_drop_index main.brackets main.aborted_clients gcol.gcol_blocked_sql_funcs_myisam main.comment_column2 compat/oracle.sp-package-concurrent-dml-view funcs_1.is_tables compat/oracle.win funcs_1.is_collations compat/oracle.plugin client.mariadb-conv-cp932 funcs_1.myisam_storedproc_08 main.almost_full funcs_1.is_views_embedded main.constraints compat/oracle.type_raw handler.interface gcol.gcol_trigger_sp_myisam funcs_1.charset_collation main.cli_options_force_protocol_not_win compat/oracle.sp-package gcol.gcol_keys_myisam funcs_1.is_engines_csv funcs_1.processlist_val_no_prot main.create_drop_db main.comments compat/oracle.sp-code main.alter_table_mdev539_myisam handler.heap main.create_drop_role funcs_1.myisam_cursors

==753308==ERROR: LeakSanitizer: detected memory leaks

SUMMARY: AddressSanitizer: 416 byte(s) leaked in 26 allocation(s).

Attempting backtrace. You can use the following information to find out

Use of uninitialized value $report in concatenation (.) or string at mysql-test-run.pl line 3473.

Can't find /dev/shm/var/1/tmp/No such file or directory at mysql-test-run.pl line 4917.

Can't find /dev/shm/var/2/tmp/No such file or directory at mysql-test-run.pl line 4917.

Can't find /dev/shm/var/5/tmp/No such file or directory at mysql-test-run.pl line 4917.