Places Status Indicator crashes Gnome Shell on login

When I enable the places extension, everything works until I log out. Then, when I try to log in, Gnome crashes and returns to the login screen (GDM). I was able to repair my installation from a vterm using gsettings to edit org.gnome.shell enabled-extensions. I am able to reproduce this crash every time.

I'm using Linux 4.14.13 x86_64, Gnome Shell 3.26.2+14+g64c857e3f, Places extension version 38.