Verification problem on tb72?

There seem to be a prolem with tb72, e.g.
on verification of this change: [1],[2]:

make[2]: ***
[C:/cygwin/home/tdf/lode/jenkins/workspace/lo_gerrit/Config/windows_msc
_dbgutil_32/external/lcms2/ExternalProject_lcms2.mk:19:
C:/cygwin/home/tdf/lode/jenkins/workspace/lo_gerrit/Config/windows_msc_
dbgutil_32/workdir/ExternalProject/lcms2/build] Error 1
make[2]: *** Waiting for unfinished jobs....
cl : Command line warning D9025 : overriding '/W4' with '/w'
make[2]: Leaving directory
'C:/cygwin/home/tdf/lode/jenkins/workspace/lo_gerrit/Config/windows_msc
_dbgutil_32'
make[1]: *** [Makefile:267: build] Error 2
make[1]: Leaving directory
'C:/cygwin/home/tdf/lode/jenkins/workspace/lo_gerrit/Config/windows_msc
_dbgutil_32'
make: *** [C:/cygwin//home/tdf/lode/bin/cygwrapper.Makefile:6: all]
Error 2
Build step 'Execute shell' marked build as failure
Finished: FAILURE

I am not able to reproduce it here, and even on anoter TB, a next
change: [3], that depends on [1], can be verified without any issue,
however on tb78: [4].

To avoid annoying false negatives, can we please fix tb72 or take it
downm unless the problem is tracked down, isolated, reproduced and
fixed?

* [1] https://gerrit.libreoffice.org/#/c/34330
* [2] https://ci.libreoffice.org/job/lo_gerrit/7862/Config=windows_msc_
dbgutil_32/consoleFull
* [3] https://gerrit.libreoffice.org/#/c/23199
* [4] https://ci.libreoffice.org/job/lo_gerrit/7861/Config=windows_msc_
dbgutil_32/consoleFull