Apparently, on Jenkins we cannot create all of these colorspaces,
so don't fail by dereferencing a null pointer:

********* Start testing of TestLcmsRGBP2020PQColorSpace *********
Config: Using QtTest library 5.12.4, Qt 5.12.4 (x86_64-little_endian-lp64 shared (dynamic) release build; by GCC 9.1.1 20190611 [gcc-9-branch revision 272147])
PASS   : TestLcmsRGBP2020PQColorSpace::initTestCase()
AddressSanitizer:DEADLYSIGNAL
=================================================================
==6181==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000008 (pc 0x7f3f02031167 bp 0x7fff6f5c1290 sp 0x7fff6f5c1280 T0)
==6181==The signal is caused by a READ memory access.
==6181==Hint: address points to the zero page.
    #0 0x7f3f02031166 in KoColorSpace::id() const /home/jenkins/workspace/Extragear/krita/kf5-qt5 SUSEQt5.12/libs/pigment/KoColorSpace.cpp:106
    #1 0x41535a in testRoundTrip(KoColorSpace const*, KoColorSpace const*, SourceType) /home/jenkins/workspace/Extragear/krita/kf5-qt5 SUSEQt5.12/plugins/color/lcms2engine/tests/TestLcmsRGBP2020PQColorSpace.cpp:44
    #2 0x418726 in testRoundTrip(KoID const&, KoID const&, SourceType) /home/jenkins/workspace/Extragear/krita/kf5-qt5 SUSEQt5.12/plugins/color/lcms2engine/tests/TestLcmsRGBP2020PQColorSpace.cpp:118
    #3 0x4192b2 in TestLcmsRGBP2020PQColorSpace::test() /home/jenkins/workspace/Extragear/krita/kf5-qt5 SUSEQt5.12/plugins/color/lcms2engine/tests/TestLcmsRGBP2020PQColorSpace.cpp:143
    #4 0x40aa2c in TestLcmsRGBP2020PQColorSpace::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) /home/jenkins/workspace/Extragear/krita/kf5-qt5 SUSEQt5.12/build/plugins/color/lcms2engine/tests/TestLcmsRGBP2020PQColorSpace_autogen/EWIEGA46WW/moc_TestLcmsRGBP2020PQColorSpace.cpp:78
    #5 0x7f3efcc6889a in QMetaMethod::invoke(QObject*, Qt::ConnectionType, QGenericReturnArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument) const (/usr/lib64/libQt5Core.so.5+0x29689a)
    #6 0x7f3f050a0962  (/usr/lib64/libQt5Test.so.5+0x19962)
    #7 0x7f3f050a1352  (/usr/lib64/libQt5Test.so.5+0x1a352)
    #8 0x7f3f050a1910  (/usr/lib64/libQt5Test.so.5+0x1a910)
    #9 0x7f3f050a1cda in QTest::qRun() (/usr/lib64/libQt5Test.so.5+0x1acda)
    #10 0x7f3f050a1edb in QTest::qExec(QObject*, int, char**) (/usr/lib64/libQt5Test.so.5+0x1aedb)
    #11 0x41b9d7 in main /home/jenkins/workspace/Extragear/krita/kf5-qt5 SUSEQt5.12/plugins/color/lcms2engine/tests/TestLcmsRGBP2020PQColorSpace.cpp:185
    #12 0x7f3efc4f2bca in __libc_start_main (/lib64/libc.so.6+0x26bca)
    #13 0x40a8f9 in _start (/home/jenkins/workspace/Extragear/krita/kf5-qt5 SUSEQt5.12/build/plugins/color/lcms2engine/tests/TestLcmsRGBP2020PQColorSpace+0x40a8f9)

AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV /home/jenkins/workspace/Extragear/krita/kf5-qt5 SUSEQt5.12/libs/pigment/KoColorSpace.cpp:106 in KoColorSpace::id() const
==6181==ABORTING