Qt 6: lupdate tests are failing

In the dev branch at qtbase 44e8c90ad4ae5a3d08651a61ac9f0937fb49d26b , qttools 359aa3a12e0e37b05c2a96d3e6de58225771fd80 , lupdate tests are failing .

The reason is apparently a crash in lprodump ( ELF 64-bit LSB core file, x86-64, version 1 (SYSV), SVR4-style, from 'qtbase/bin/lprodump -silent project.pro -out /data1', real uid: 1000, effective uid: 1000, real gid: 1000, effective gid: 1000, execfn: 'qtbase/bin/lprodump', platform: 'x86_64'
) .

The Linux crash was reproduced locally, in COIN, it manifests at https://codereview.qt-project.org/c/qt/qttools/+/298067 .