I see this in your build log: ------------------------------------------------------------------------
FAIL: ibus-engine-switch ======================== /ibus/engine-switch/global-engine: (/tmp/buildd/ibus-1.5.11/src/tests/.libs/lt-ibus-engine-switch:3911): GLib-CRITICAL **: Source ID 5 was not found when attempting to remove it Trace/breakpoint trap FAIL ibus-engine-switch (exit status: 133) FAIL: ibus-compose ================== Unable to init server: Could not connect: Connection refused (lt-ibus-compose:4077): Gtk-WARNING **: cannot open display: FAIL ibus-compose (exit status: 1) ------------------------------------------------------------------------ Please make an upload to disable those tests and make the tests to be verbose, so that we can better debug what's happening here. Also, please try building with sbuild. When using sbuild, I don't see any messages about the tests at all. Maybe there is a bug in sbuild, or maybe there is a bug in ibus which is only triggered by sbuild, but we will never know if you use pbuilder. Thanks.