I have a bundle command implemented in Ruby that uses TextMate.detatch. The tm/detach.rb requires ui.rb which requires plist.bundle. Loading the plist bundle crashes with a segmentation fault. The issue occurs on Mojave but not on High Sierra. I’m using "/usr/bin/env ruby20” as the Ruby for running the command. The command is available here [1].

[1] https://github.com/textmate/d.tmbundle/blob/master/Commands/Start%20DCD.tmCommand#L10-L19