Modified 'restart' Kernel.exec to always call 'ruby'

CHANGELOG.md

@@ -10,6 +10,7 @@
 
 * `where` command failing on instance_exec block stack frames
 * `restart` command crashing in certain cases because of a missing `require 'English'` (#321, @akaneko3).
+* `restart` command crashing when debugged script is not executable or has no shebang (#321, @akaneko3).
 
 ## 9.0.6 - 2016-09-29
 

lib/byebug/commands/restart.rb

@@ -2,6 +2,7 @@
 require 'byebug/helpers/path'
 require 'shellwords'
 require 'English'
+require 'rbconfig'
 
 module Byebug
   #
@@ -36,6 +37,7 @@ def execute
       argv = [$PROGRAM_NAME]
 
       argv.unshift(bin_file) if Byebug.mode == :standalone
+      argv.unshift(RbConfig.ruby)
 
       argv += (@match[:args] ? @match[:args].shellsplit : $ARGV.compact)
 

test/commands/restart_test.rb

@@ -1,4 +1,5 @@
 require 'test_helper'
+require 'rbconfig'
 
 module Byebug
   #
@@ -8,31 +9,37 @@ class RestartTest < TestCase
     def test_restart_without_arguments_in_standalone_mode
       with_mode(:standalone) do
         with_command_line(example_path, '1') do
-          assert_restarts(nil, "#{Context.bin_file} #{example_path} 1")
+          assert_restarts(
+            nil,
+            "#{RbConfig.ruby} #{Context.bin_file} #{example_path} 1"
+          )
         end
       end
     end
 
     def test_restart_with_arguments_in_standalone_mode
       with_mode(:standalone) do
         with_command_line(example_path, '1') do
-          assert_restarts('2', "#{Context.bin_file} #{example_path} 2")
+          assert_restarts(
+            '2',
+            "#{RbConfig.ruby} #{Context.bin_file} #{example_path} 2"
+          )
         end
       end
     end
 
     def test_restart_without_arguments_in_attached_mode
       with_mode(:attached) do
         with_command_line(example_path, '1') do
-          assert_restarts(nil, "#{example_path} 1")
+          assert_restarts(nil, "#{RbConfig.ruby} #{example_path} 1")
         end
       end
     end
 
     def test_restart_with_arguments_in_attached_mode
       with_mode(:attached) do
         with_command_line(example_path, '1') do
-          assert_restarts(2, "#{example_path} 2")
+          assert_restarts(2, "#{RbConfig.ruby} #{example_path} 2")
         end
       end
     end