macOS
$ bundle exec rails s
.../test-260/vendor/bundle/ruby/2.6.0/gems/bootsnap-1.3.0/lib/bootsnap/compile_cache/iseq.rb:12: [BUG] Segmentation fault at 0x0000751500007508
ruby 2.6.0preview1 (2018-02-24 trunk 62554) [x86_64-darwin17]
-- Control frame information -----------------------------------------------
c:0041 p:---- s:0228 e:000227 CFUNC :to_binary
c:0040 p:0017 s:0224 e:000223 METHOD .../test-260/vendor/bundle/ruby/2.6.0/gems/bootsnap-1.3.0/lib/bootsnap/compile_cache/iseq [FINISH]
bootsnapだったー。
Gemfileから
-# Reduces boot times through caching; required in config/boot.rb
-gem 'bootsnap', '>= 1.1.0', require: false
してconfig/boot.rbから
-require 'bootsnap/setup' # Speed up boot time by caching expensive operations.
して、
$ bundle exec rails s
起動したー :)