export-validation in tests by default causing 32 bit Ubuntu to crash

Ever since
https://cgit.freedesktop.org/libreoffice/core/commit/?id=0868f670374cdcf6c2610d91ff8702f59b2e0bd3

With 32-bit Ubuntu 16.04, I'm getting the following build failure:

CUT] sw_ww8import
testTscp::Import_Export_Import finished in: 354ms
testFdo45724::Import finished in: 0ms
File tested,Execution Time (ms)
Segmentation fault (core dumped)

No core file identified in directory /core/workdir/CppunitTest/sw_ww8export.test.core
To show backtraces for crashes during test execution,
enable core files with:

   ulimit -c unlimited


Error: a unit test failed, please do one of:
make CppunitTest_sw_ww8export CPPUNITTRACE="gdb --args"
    # for interactive debugging on Linux
make CppunitTest_sw_ww8export VALGRIND=memcheck
    # for memory checking
make CppunitTest_sw_ww8export DEBUGCPPUNIT=TRUE
    # for exception catching

/core/solenv/gbuild/CppunitTest.mk:101: recipe for target 
'/core/workdir/CppunitTest/sw_ww8export.test' failed
make[1]: *** [/core/workdir/CppunitTest/sw_ww8export.test] Error 1
make[1]: *** Waiting for unfinished jobs....
Aborted (core dumped)
/core/test/source/bootstrapfixture.cxx:177:SdImportTest::testDocumentLayout
equality assertion failed
- Expected: 0
- Actual  : 34304
- failed to execute: sh /core/bin/officeotron.sh /tmp/lu16851plw1cl.tmp > /tmp/lu16851plw1cn.tmp

SdImportTest::testDocumentLayout finished in: 46233ms
SdImportTest::testSmoketest finished in: 200ms
SdImportTest::testN759180 finished in: 237ms
SdImportTest::testN778859 finished in: 253ms
...
SdImportTest::testTdf93868 finished in: 262ms
SdImportTest::testTdf95932 finished in: 230ms
SdImportTest::testTdf99030 finished in: 189ms
SdImportTest::testTdf49561 finished in: 105ms
bootstrapfixture.cxx:177:Assertion
Test name: SdImportTest::testDocumentLayout
equality assertion failed
- Expected: 0
- Actual  : 34304
- failed to execute: sh /core/bin/officeotron.sh /tmp/lu16851plw1cl.tmp > /tmp/lu16851plw1cn.tmp

Failures !!!
Run: 46   Failure total: 1   Failures: 1   Errors: 0

Error: a unit test failed, please do one of:
make CppunitTest_sd_import_tests CPPUNITTRACE="gdb --args"
    # for interactive debugging on Linux
make CppunitTest_sd_import_tests VALGRIND=memcheck
    # for memory checking
make CppunitTest_sd_import_tests DEBUGCPPUNIT=TRUE
    # for exception catching

/core/solenv/gbuild/CppunitTest.mk:101: recipe for target 
'/core/workdir/CppunitTest/sd_import_tests.test' failed
make[1]: *** [/core/workdir/CppunitTest/sd_import_tests.test] Error 1
Makefile:261: recipe for target 'build' failed
make: *** [build] Error 2

-----------------------

Vasily,
Is there anything else I can do to help you resolve this build failure?

<https://cgit.freedesktop.org/libreoffice/core/commit/?id=0868f670374cdcf6c2610d91ff8702f59b2e0bd3>