Noel, That fix and subsequent fixes are not enough. Windows debug builds are still failing. Currently they fail on CppunitTest_services: https://ci.libreoffice.org/job/lo_tb_master_win_dbg/18045/consoleFull#-1107669237d893063f-7f3d-4b7e-b56f-4e0f225817cd /usr/bin/sh: line 1: 6252 Segmentation fault ( PATH="C:\cygwin\home\tdf\lode\jenkins\workspace\lo_tb_master_win_dbg\instdir\program;C:\cygwin\home\tdf\lode\jenkins\workspace\lo_tb_master_win_dbg\instdir\program;C:\cygwin\home\tdf\lode\jenkins\workspace\lo_tb_master_win_dbg\workdir\LinkTarget\Library;C:\cygwin\home\tdf\lode\jenkins\workspace\lo_tb_master_win_dbg\workdir\UnpackedTarball\cppunit\src\cppunit\ReleaseDll;$PATH" PYTHONDONTWRITEBYTECODE=1 $W/LinkTarget/Executable/cppunittester.exe $W/LinkTarget/CppunitTest/test_services.dll --headless "-env:BRAND_BASE_DIR=file:///$S/instdir" "-env:BRAND_SHARE_SUBDIR=share" "-env:BRAND_SHARE_RESOURCE_SUBDIR=program/resource" "-env:UserInstallation=file:///$W/CppunitTest/services.test.user" "-env:CONFIGURATION_LAYERS=xcsxcu:file:///$I/share/registry xcsxcu:file:///$W/unittest/registry" "-env:UNO_TYPES=file:///$I/program/types.rdb file:///$I/program/types/offapi.rdb file:///$I/program/types/oovbaapi.rdb" "-env:UNO_SERVICES=file:///$W/Rdb/ure/services.rdb file:///$W/Rdb/services.rdb file:///$W/Rdb/pyuno.rdb" -env:URE_MORE_JAVA_TYPES=file:///$I/program/classes/unoil.jar -env:URE_INTERNAL_LIB_DIR=file:///$I/program -env:LO_LIB_DIR=file:///$I/program -env:LO_JAVA_DIR=file:///$I/program/classes --protector $W/LinkTarget/Library/unoexceptionprotector.dll unoexceptionprotector --protector $W/LinkTarget/Library/unobootstrapprotector.dll unobootstrapprotector --protector $W/LinkTarget/Library/vclbootstrapprotector.dll vclbootstrapprotector "-env:CPPUNITTESTTARGET=$W/CppunitTest/services.test" ) > $W/CppunitTest/services.test.log 2>&1 From Jenkins you can see that every tb_master_win_dbg build after https://cgit.freedesktop.org/libreoffice/core/commit/?id=9cceba9a928cf3b3447f293020be2fe76c035ed5 fails. Release builds are fine.