Pass show_code: false to binding.irb if available

Author: k0kubun

debug.gemspec

@@ -27,6 +27,6 @@ Gem::Specification.new do |spec|
   spec.require_paths = ["lib"]
   spec.extensions    = ['ext/debug/extconf.rb']
 
-  spec.add_dependency "irb", ">= 1.3.6" # for its color_printer class, which was added after 1.3
+  spec.add_dependency "irb", ">= 1.5.0" # for binding.irb(show_code: false)
   spec.add_dependency "reline", ">= 0.3.1"
 end

lib/debug/thread_client.rb

@@ -986,8 +986,9 @@ def wait_next_action_
           when :call
             result = frame_eval(eval_src)
           when :irb
+            require 'irb' # prelude's binding.irb doesn't have show_code option
             begin
-              result = frame_eval('binding.irb', binding_location: true)
+              result = frame_eval('binding.irb(show_code: false)', binding_location: true)
             ensure
               # workaround: https://github.com/ruby/debug/issues/308
               Reline.prompt_proc = nil if defined? Reline