unit.conc_misc and unit.conc_connection fail with clang-3.8.0

+ cmake /source -DCMAKE_BUILD_TYPE=RelWithDebInfo -DWITH_PROTOBUF=system -DWITH_NDB_JAVA=NO -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++ '-DCMAKE_C_FLAGS_RELWITHDEBINFO=-O3 -g -mtune=native' '-DCMAKE_CXX_FLAGS_RELWITHDEBINFO=-O3 -g -mtune=native' '-DCMAKE_C_FLAGS=-O3 -g -mtune=native' '-DCMAKE_CXX_FLAGS=-O3 -g -mtune=native' -DWITH_SSL=system -DCMAKE_INSTALL_PREFIX=/mysql/mariadb-upstream-RelWithDebInfo-10.2 -DWITHOUT_OQGRAPH_STORAGE_ENGINE=1 -DCMAKE_C_COMPILER_LAUNCHER=ccache -DCMAKE_CXX_COMPILER_LAUNCHER=ccache -DWITHOUT_TOKUDB_STORAGE_ENGINE=1

-- Running cmake version 3.5.1

-- The C compiler identification is Clang 3.8.0

-- The CXX compiler identification is Clang 3.8.0

-- Check for working C compiler: /usr/bin/clang

-- Check for working C compiler: /usr/bin/clang -- works

-- Detecting C compiler ABI info

-- Detecting C compiler ABI info - done

-- Detecting C compile features

-- Detecting C compile features - done

-- Check for working CXX compiler: /usr/bin/clang++

-- Check for working CXX compiler: /usr/bin/clang++ -- works

...

+ ./mtr --skip-test-list=/source/mysql-test/unstable-tests --skip-test=perfschema.socket_summary_by_event_name_func --skip-test=perfschema.privilege_table_io --force --big-test --nowarnings

Logging: /source/mysql-test/mysql-test-run.pl  --skip-test-list=/source/mysql-test/unstable-tests --skip-test=perfschema.socket_summary_by_event_name_func --skip-test=perfschema.privilege_table_io --force --big-test --nowarnings

vardir: /build/build/mysql-test/var

Removing old var directory...

Creating var directory '/build/build/mysql-test/var'...

 - symlinking 'var' to '/dev/shm/var_auto_N3TY'

Checking supported features...

MariaDB Version 10.2.7-MariaDB

 - SSL connections supported

Using suites: main-,archive-,binlog-,binlog_encryption-,csv-,encryption-,federated-,funcs_1-,funcs_2-,gcol-,handler-,heap-,innodb-,innodb_fts-,innodb_gis-,innodb_zip-,json-,maria-,mariabackup-,multi_source-,optimizer_unfixed_bugs-,parts-,percona-,perfschema-,plugins-,roles-,rpl-,sys_vars-,unit-,vcol-,wsrep-,connect,mroonga/wrapper,mroonga/storage,rocksdb_sys_vars,rocksdb,sequence,spider,spider/handler,spider/bg,sql_discovery,metadata_lock_info,query_response_time,user_variables,wsrep_info

Collecting tests...

Installing system database...

Using parallel: 12

...

...

];mtr: spent 0:08:27 on 4206 tests. 0:00:00 (0 tests) leftunit.conc_misc                           w5 [ fail ]

        Test ended at 2017-07-10 22:46:11

CURRENT_TEST: unit.conc_misc

# port: 16040

# socketname: /build/build/mysql-test/var/tmp/5/mysqld.1.sock

1..23

# Testing against MySQL Server 10.2.7-MariaDB-log

# Host: Localhost via UNIX socket

# Client library: 10.2.7

# Config file: /build/build/mysql-test/var/tmp/5/.my.cnf

# Error: expected charset latin2 (/source/libmariadb/unittest/libmariadb/misc.c: 1090)

not ok 1 - test_mdev12965

ok 2 - test_wl6797

ok 3 - test_server_status

# error: Lost connection to MySQL server during query

ok 4 - test_read_timeout

# zerofill: 0000000001

ok 5 - test_zerofill

# max_allowed_packet: 1073741824

# net_buffer_length: 8192

# client_version_id: 100207

# server_version_id: 100207

# charset name: latin1

# connection type: 0

# protocol_version: 10

# server_type: MariaDB

# server_version: 10.2.7-MariaDB-log

# client_version: 10.2.7

# charset_name: utf8

# charset_nr: 33

# charset_name: binary

# error[0]: Unknown MySQL error

# mariadb_info: Records: 2  Duplicates: 0  Warnings: 0

ok 6 - test_get_info

ok 7 - test_conc117

# Error: Plugin foo could not be loaded: /mysql/mariadb-upstream-RelWithDebInfo-10.2/lib/plugin/foo.so: cannot open shared object file: No such file or directory

ok 8 - test_conc_114

ok 9 - test_connect_attrs

ok 10 - test_conc49

ok 11 - test_bug28075

ok 12 - test_bug28505

ok 13 - test_debug_example

ok 14 - test_bug29692

ok 15 - test_bug31418

ok 16 - test_frm_bug

ok 17 - test_wl4166_1

# rc=1 error: 2057

ok 18 - test_wl4166_2

# rc=0 

ok 19 - test_wl4166_3

ok 20 - test_wl4166_4

# InnoDB not configured or available

ok 21 # skip test_wl4284_1

ok 22 - test_bug49694

# Error: 2

ok 23 - test_ldi_path

# close default

# Failed 1 tests!

 - saving '/build/build/mysql-test/var/5/log/unit.conc_misc/' to '/build/build/mysql-test/var/log/unit.conc_misc/'

];mtr: spent 0:08:28 on 4206 tests. 0:00:00 (0 tests) leftunit.conc_connection                     w6 [ fail ]

        Test ended at 2017-07-10 22:46:22

CURRENT_TEST: unit.conc_connection

# port: 16060

# socketname: /build/build/mysql-test/var/tmp/6/mysqld.1.sock

1..22

# Testing against MySQL Server 10.2.7-MariaDB-log

# Host: Localhost via UNIX socket

# Client library: 10.2.7

# Error: Expected charset latin2 (/source/libmariadb/unittest/libmariadb/connection.c: 1243)

not ok 1 - test_mdev13100

# server doesn't support sha256 authentication

ok 2 # skip test_auth256

ok 3 - test_reset

ok 4 - test_unix_socket_close

# session tracking not fully supported yet in 10.2

ok 5 # skip test_sess_track_db

# foo1 => bar1

# foo3 => bar3

# foo2 => bar2

ok 6 - test_get_options

# test doesn't work with unix sockets

ok 7 # skip test_wrong_bind_address

# test doesn't work with unix sockets

ok 8 # skip test_bind_address

ok 9 - test_conc118

ok 10 - test_conc66

ok 11 - test_bug20023

# Due to mysql_change_user security fix this test will not work anymore.

ok 12 # skip test_bug31669

ok 13 - test_bug33831

# Due to mysql_change_user security fix this test will not work anymore.

ok 14 # skip test_change_user

true: 1

ok 15 - test_opt_reconnect

ok 16 - test_compress

# Thread_id before kill: 407

# Thread_id after kill: 408

ok 17 - test_reconnect

ok 18 - test_conc21

ok 19 - test_conc26

# elapsed: 5

ok 20 - test_connection_timeout

# elapsed: 0

ok 21 - test_connection_timeout2

# elapsed: 5

# elapsed: 10

ok 22 - test_connection_timeout3

# close default

# Failed 1 tests!

 - saving '/build/build/mysql-test/var/6/log/unit.conc_connection/' to '/build/build/mysql-test/var/log/unit.conc_connection/'

];mtr: spent 0:08:39 on 4206 tests. 0:00:00 (0 tests) leftinnodb.innodb_bug52663 'innodb'          w3 [ pass ]  50691

];mtr: spent 0:08:54 on 4206 tests. 0:00:00 (0 tests) leftmain.ssl-big                             w4 [ pass ]  119177

];mtr: spent 0:09:36 on 4206 tests. 0:00:00 (0 tests) leftarchive.archive-big                      w2 [ pass ]  254456

];mtr: spent 0:10:07 on 4206 tests. 0:00:00 (0 tests) left--------------------------------------------------------------------------

The servers were restarted 939 times

Spent 4270.389 of 607 seconds executing testcases

Completed: Failed 2/4007 tests, 99.95% were successful.

Failing test(s): unit.conc_misc unit.conc_connection