Dear Maintainer, I guess this has to do with the package libgtkd-3-0. Currently testing contains the version 3.8.5-1+b2. That one got compiled with ldc 1:1.17.0-2.
The version 3.8.5-1 got compiled with ldc 1:1.12.0-1. Installing that version from [1] makes tilix at least run and open its window. That might be another workaround, until tilix 1.9.3-1 transitions to testing. This situation might be a side effect of the rebuilt +b2 of tilix 1.8.9-1 failing against ldc 1:1.17.0-2. That was taken care of by uploading tilix 1.9.3-1, that currently waits for gtk-d to transition and the armhf build before it transitions to testing. Kind regards, Bernhard [1] https://snapshot.debian.org/archive/debian/20190107T030854Z/pool/main/g/gtk-d/libgtkd-3-0_3.8.5-1_amd64.deb [2] https://buildd.debian.org/status/logs.php?pkg=tilix&arch=amd64