Spring

Author: andyw8

lib/ruby_lsp/ruby_lsp_rails/runner_client.rb

@@ -41,11 +41,13 @@ def initialize
         # Spring needs a Process session ID. It uses this ID to "attach" itself to the parent process, so that when the
         # parent ends, the spring process ends as well. If this is not set, Spring will throw an error while trying to
         # set its own session ID
-        begin
-          Process.setpgrp
-          Process.setsid
-        rescue Errno::EPERM
-          # If we can't set the session ID, continue
+        if defined?(Spring)
+          begin
+            Process.setpgrp
+            Process.setsid
+          rescue Errno::EPERM
+            # If we can't set the session ID, continue
+          end
         end
 
         stdin, stdout, stderr, wait_thread = Open3.popen3(