This change is used/required by Rubymine to run the debugger

There are no side-effects as it's "feature toggled" by env variable

config/spring.rb

@@ -4,3 +4,13 @@
   tmp/restart.txt
   tmp/caching-dev.txt
 ).each { |path| Spring.watch(path) }
+
+Spring.after_fork do
+  if ENV['DEBUGGER_STORED_RUBYLIB']
+    ENV['DEBUGGER_STORED_RUBYLIB'].split(File::PATH_SEPARATOR).each do |path|
+      next unless path =~ /ruby-debug-ide/
+
+      load path + '/ruby-debug-ide/multiprocess/starter.rb'
+    end
+  end
+end