added attached flag to indicate if we are currently under debug. This is needed for attach mode: if we detached pre_child should not be called in fork and exec

Author: equivalence1

bin/rdebug-ide

@@ -140,6 +140,8 @@ Debugger.evaluation_timeout = options.evaluation_timeout
 Debugger.catchpoint_deleted_event = options.catchpoint_deleted_event || options.rm_protocol_extensions
 Debugger.value_as_nested_element = options.value_as_nested_element || options.rm_protocol_extensions
 
+Debugger.attached = true
+
 if options.attach_mode
   if Debugger::FRONT_END == "debase"
     Debugger.init_variables

lib/ruby-debug-ide.rb

@@ -43,6 +43,7 @@ def cleanup_backtrace(backtrace)
        cleared
     end
 
+    attr_accessor :attached
     attr_accessor :cli_debug, :xml_debug, :evaluation_timeout
     attr_accessor :control_thread
     attr_reader :interface

lib/ruby-debug-ide/commands/control.rb

@@ -136,6 +136,7 @@ def regexp
     end
 
     def execute
+      Debugger.attached = false
       Debugger.stop
       Debugger.interface.close
       Debugger.control_thread = nil

lib/ruby-debug-ide/multiprocess/pre_child.rb

@@ -2,6 +2,8 @@ module Debugger
   module MultiProcess
     class << self
       def pre_child(options = nil)
+        return unless Debugger.attached
+
         require 'socket'
         require 'ostruct'