main.func_regexp_pcre fails in buildbot on ppc64le: server crash or wrong result

main.func_regexp_pcre                    w2 [ fail ]

        Test ended at 2017-07-25 09:20:00

CURRENT_TEST: main.func_regexp_pcre

mysqltest: At line 432: query 'SELECT 1 FROM dual WHERE ('Alpha,Bravo,Charlie,Delta,Echo,Foxtrot,StrataCentral,Golf,Hotel,India,Juliet,Kilo,Lima,Mike,StrataL3,November,Oscar,StrataL2,Sand,P3,P4SwitchTest,Arsys,Poppa,ExtensionMgr,Arp,Quebec,Romeo,StrataApiV2,PtReyes,Sierra,SandAcl,Arrow,Artools,BridgeTest,Tango,SandT,PAlaska,Namespace,Agent,Qos,PatchPanel,ProjectReport,Ark,Gimp,Agent,SliceAgent,Arnet,Bgp,Ale,Tommy,Central,AsicPktTestLib,Hsc,SandL3,Abuild,Pca9555,Standby,ControllerDut,CalSys,SandLib,Sb820,PointV2,BfnLib,Evpn,BfnSdk,Sflow,ManagementActive,AutoTest,GatedTest,Bgp,Sand,xinetd,BfnAgentLib,bf-utils,Hello,BfnState,Eos,Artest,Qos,Scd,ThermoMgr,Uniform,EosUtils,Eb,FanController,Central,BfnL3,BfnL2,tcp_wrappers,Victor,Environment,Route,Failover,Whiskey,Xray,Gimp,BfnFixed,Strata,SoCal,XApi,Msrp,XpProfile,tcpdump,PatchPanel,ArosTest,FhTest,Arbus,XpAcl,MacConc,XpApi,telnet,QosTest,Alpha2,BfnVlan,Stp,VxlanControllerTest,MplsAgent,Bravo2,Lanz,BfnMbb,Intf,XCtrl,Unicast,SandTunnel,L3Unicast,Ipsec,MplsTest,Rsvp,EthIntf,StageMgr,Sol,MplsUtils,Nat,Ira,P4NamespaceDut,Counters,Charlie2,Aqlc,Mlag,Power,OpenFlow,Lag,RestApi,BfdTest,strongs,Sfa,CEosUtils,Adt746,MaintenanceMode,MlagDut,EosImage,IpEth,MultiProtocol,Launcher,Max3179,Snmp,Acl,IpEthTest,PhyEee,bf-syslibs,tacc,XpL2,p4-ar-switch,p4-bf-switch,LdpTest,BfnPhy,Mirroring,Phy6,Ptp'  REGEXP '^((?!\b(Strata|StrataApi|StrataApiV2)\b).)*$')' failed: 2013: Lost connection to MySQL server during query

The result from queries just before the failure was:

< snip >

# Testing workaround N1: This makes the pattern to be a binary string:

SET NAMES latin1;

SET @regCheck= X'E001';

SELECT 0xE001 REGEXP @regCheck;

0xE001 REGEXP @regCheck

1

# Testing workaround N2: This also makes the pattern to be a binary string, using a different syntax:

SET NAMES latin1;

SET @regCheck= _binary '\\xE0\\x01';

SELECT 0xE001 REGEXP @regCheck;

0xE001 REGEXP @regCheck

1

# Testing workarond N3: This makes derivation of the subject string stronger (IMLICIT instead of COERCIBLE)

SET NAMES latin1;

SET @regCheck= '\\xE0\\x01';

SELECT CAST(0xE001 AS BINARY) REGEXP @regCheck;

CAST(0xE001 AS BINARY) REGEXP @regCheck

1

# MDEV-12420: Testing recursion overflow

SELECT 1 FROM dual WHERE ('Alpha,Bravo,Charlie,Delta,Echo,Foxtrot,StrataCentral,Golf,Hotel,India,Juliet,Kilo,Lima,Mike,StrataL3,November,Oscar,StrataL2,Sand,P3,P4SwitchTest,Arsys,Poppa,ExtensionMgr,Arp,Quebec,Romeo,StrataApiV2,PtReyes,Sierra,SandAcl,Arrow,Artools,BridgeTest,Tango,SandT,PAlaska,Namespace,Agent,Qos,PatchPanel,ProjectReport,Ark,Gimp,Agent,SliceAgent,Arnet,Bgp,Ale,Tommy,Central,AsicPktTestLib,Hsc,SandL3,Abuild,Pca9555,Standby,ControllerDut,CalSys,SandLib,Sb820,PointV2,BfnLib,Evpn,BfnSdk,Sflow,ManagementActive,AutoTest,GatedTest,Bgp,Sand,xinetd,BfnAgentLib,bf-utils,Hello,BfnState,Eos,Artest,Qos,Scd,ThermoMgr,Uniform,EosUtils,Eb,FanController,Central,BfnL3,BfnL2,tcp_wrappers,Victor,Environment,Route,Failover,Whiskey,Xray,Gimp,BfnFixed,Strata,SoCal,XApi,Msrp,XpProfile,tcpdump,PatchPanel,ArosTest,FhTest,Arbus,XpAcl,MacConc,XpApi,telnet,QosTest,Alpha2,BfnVlan,Stp,VxlanControllerTest,MplsAgent,Bravo2,Lanz,BfnMbb,Intf,XCtrl,Unicast,SandTunnel,L3Unicast,Ipsec,MplsTest,Rsvp,EthIntf,StageMgr,Sol,MplsUtils,Nat,Ira,P4NamespaceDut,Counters,Charlie2,Aqlc,Mlag,Power,OpenFlow,Lag,RestApi,BfdTest,strongs,Sfa,CEosUtils,Adt746,MaintenanceMode,MlagDut,EosImage,IpEth,MultiProtocol,Launcher,Max3179,Snmp,Acl,IpEthTest,PhyEee,bf-syslibs,tacc,XpL2,p4-ar-switch,p4-bf-switch,LdpTest,BfnPhy,Mirroring,Phy6,Ptp'  REGEXP '^((?!\b(Strata|StrataApi|StrataApiV2)\b).)*$');

More results from queries before failure can be found in /dev/shm/var/2/log/func_regexp_pcre.log

Server [mysqld.1 - pid: 16801, winpid: 16801, exit: 256] failed during test run

Server log from this test:

----------SERVER LOG START-----------

----------SERVER LOG END-------------

main.func_regexp_pcre                    w1 [ fail ]

        Test ended at 2017-07-20 15:38:10

CURRENT_TEST: main.func_regexp_pcre

--- /usr/share/mysql/mysql-test/r/func_regexp_pcre.result	2017-07-20 14:24:19.000000000 -0400

+++ /dev/shm/var/1/log/func_regexp_pcre.reject	2017-07-20 15:38:09.916000008 -0400

@@ -881,7 +881,9 @@

 Warning	1139	Got error 'pcre_exec: recursion limit of NUM exceeded' from regexp

 SELECT CONCAT(REPEAT('100,',500),'101') RLIKE '^(([1-9][0-9]*),)*[1-9][0-9]*$';

 CONCAT(REPEAT('100,',500),'101') RLIKE '^(([1-9][0-9]*),)*[1-9][0-9]*$'

-1

+0

+Warnings:

+Warning	1139	Got error 'pcre_exec: recursion limit of 434 exceeded' from regexp

 SELECT CONCAT(REPEAT('100,',600),'101') RLIKE '^(([1-9][0-9]*),)*[1-9][0-9]*$';

 CONCAT(REPEAT('100,',600),'101') RLIKE '^(([1-9][0-9]*),)*[1-9][0-9]*$'

 0

@@ -889,7 +891,9 @@

 Warning	1139	Got error 'pcre_exec: recursion limit of NUM exceeded' from regexp

 SELECT REGEXP_INSTR(CONCAT(REPEAT('100,',500),'101'), '^(([1-9][0-9]*),)*[1-9][0-9]*$');

 REGEXP_INSTR(CONCAT(REPEAT('100,',500),'101'), '^(([1-9][0-9]*),)*[1-9][0-9]*$')

-1

+0

+Warnings:

+Warning	1139	Got error 'pcre_exec: recursion limit of 434 exceeded' from regexp

 SELECT REGEXP_INSTR(CONCAT(REPEAT('100,',600),'101'), '^(([1-9][0-9]*),)*[1-9][0-9]*$');

 REGEXP_INSTR(CONCAT(REPEAT('100,',600),'101'), '^(([1-9][0-9]*),)*[1-9][0-9]*$')

 0

@@ -897,7 +901,9 @@

 Warning	1139	Got error 'pcre_exec: recursion limit of NUM exceeded' from regexp

 SELECT LENGTH(REGEXP_SUBSTR(CONCAT(REPEAT('100,',500/3),'101'), '^(([1-9][0-9]*),)*[1-9][0-9]*$'));

 LENGTH(REGEXP_SUBSTR(CONCAT(REPEAT('100,',500/3),'101'), '^(([1-9][0-9]*),)*[1-9][0-9]*$'))

-671

+0

+Warnings:

+Warning	1139	Got error 'pcre_exec: recursion limit of 433 exceeded' from regexp

 SELECT LENGTH(REGEXP_SUBSTR(CONCAT(REPEAT('100,',600/3),'101'), '^(([1-9][0-9]*),)*[1-9][0-9]*$'));

 LENGTH(REGEXP_SUBSTR(CONCAT(REPEAT('100,',600/3),'101'), '^(([1-9][0-9]*),)*[1-9][0-9]*$'))

 0

@@ -905,7 +911,9 @@

 Warning	1139	Got error 'pcre_exec: recursion limit of NUM exceeded' from regexp

 SELECT LENGTH(REGEXP_REPLACE(CONCAT(REPEAT('100,',500/3),'101'), '^(([1-9][0-9]*),)*[1-9][0-9]*$', ''));

 LENGTH(REGEXP_REPLACE(CONCAT(REPEAT('100,',500/3),'101'), '^(([1-9][0-9]*),)*[1-9][0-9]*$', ''))

-0

+671

+Warnings:

+Warning	1139	Got error 'pcre_exec: recursion limit of 433 exceeded' from regexp

 SELECT LENGTH(REGEXP_REPLACE(CONCAT(REPEAT('100,',600/3),'101'), '^(([1-9][0-9]*),)*[1-9][0-9]*$', ''));

 LENGTH(REGEXP_REPLACE(CONCAT(REPEAT('100,',600/3),'101'), '^(([1-9][0-9]*),)*[1-9][0-9]*$', ''))

 803

mysqltest: Result length mismatch