Comment 8 for bug 1931701

Bisecting this in gcc-9 points to https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=49cc1253d079bbefc18275f29adc526679422176

Preparing a patched gcc-9 based on 9.4.0-1ubuntu1 by reverting this specific change has confirmed it. libreoffice 7.1.4-0ubuntu1, using gcc-9 on armhf again, built and passed the failing test.