Failing tests on openSUSE

Hello,

when building 5.4.0-beta1 on openSUSE one of the tests is consitently
failing for me:

[ 1117s] (anonymous namespace)::CanvasBitmapTest::runTest finished in: 778ms
[ 1117s]
/home/abuild/rpmbuild/BUILD/libreoffice-5.4.0.0.beta1/vcl/qa/cppunit/complextext.cxx:77:VclComplexTextTest::testArabic
[ 1117s] equality assertion failed
[ 1117s] - Expected: { 6, 9, 16, 16, 22, 22, 26, 29, 32, 32, 36, 40, 49,
53, 56, 63, 63, 66, 72, 72 }
[ 1117s] - Actual  : { 9, 18, 27, 36, 45, 54, 57, 66, 75, 84, 93, 102, 111,
114, 123, 132, 141, 150, 159, 168 }
[ 1117s]
[ 1117s] VclComplexTextTest::testArabic finished in: 31ms
[ 1117s] complextext.cxx:77:Assertion
[ 1117s] Test name: VclComplexTextTest::testArabic
[ 1117s] equality assertion failed
[ 1117s] - Expected: { 6, 9, 16, 16, 22, 22, 26, 29, 32, 32, 36, 40, 49,
53, 56, 63, 63, 66, 72, 72 }
[ 1117s] - Actual  : { 9, 18, 27, 36, 45, 54, 57, 66, 75, 84, 93, 102, 111,
114, 123, 132, 141, 150, 159, 168 }
[ 1117s]
[ 1117s] Failures !!!
[ 1117s] Run: 2   Failure total: 1   Failures: 1   Errors: 0

Full log [1].

I really have no clue what the test is doing or how to fix it. The commits
introducing the tests are:
https://cgit.freedesktop.org/libreoffice/core/commit/vcl/qa/cppunit/complextext.cxx?id=62592cf1ebcc8ef381fe53855684342d963e6138
https://cgit.freedesktop.org/libreoffice/core/commit/vcl/qa/cppunit/complextext.cxx?id=9af45ef67824f3ec6e95c16e7deb005a73532d65

Any help ideas how to fix this?

Tom

[1]
https://build.opensuse.org/package/live_build_log/LibreOffice:Unstable/libreoffice/openSUSE_Factory/x86_64