Crash happens consistently:
(1) Launch pgAdmin.
(2) Choose pgAdmin > Preferences > Query tool
(3) Click the Font button. A floating Fonts panel appears.
(4) Click any font in the list, such as Menlo. «Crash»
Postgres 9.5
pgAdmin 1.22.0 (rev: REL-1_22_0)
Mac OS X 10.11.3 El Capitan (running inside a Parallels virtual machine)
—Basil Bourque