11.4-STABLE - libcxxrt changes (?) broke libreoffice

[Bengt Ahlgren]

After updating my laptop with 11.4-STABLE to r369345, libreoffice
(7.0.3.1_2) just exits with "Application Error".  Going back to
11.4-STABLE r369313, before the libcxxrt changes, makes the same
libreoffice binary work again.

I build libreoffice with the KF5, QT5 and JAVA options on, in a 11.4-REL
poudriere jail.

I didn't see any other application crashes.

Any clues?  I can provide more info if needed.

Bengt