telepathy-glib used to make critical warnings fatal for CMs (Bug #14603). Versions >= 0.9.3 will not do this, so if we want the code-quality benefits of treating these warnings as fatal, we should enable that specifically in each CM where it's relevant. In Haze's case, we need to be careful about what's critical and what isn't, since some of libpurple is apparently quite critical-happy. (WONTFIX is an acceptable resolution for this bug if that's the maintainers' considered opinion.)
I fixed this while debugging the TpBaseContactList branch of Haze.
r+ from Jonny on IRC, fixed in git for 0.5.0.
Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.