diff --git a/ChangeLog b/ChangeLog
index bac9627f06..5c2e2ab23a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+Tue Oct 28 16:22:41 2014  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* ruby.c (process_options, load_file_internal2): should not
+	  require other files when dump option is given.
+	  [ruby-dev:48712] [Bug #10435]
+
 Tue Oct 28 14:51:38 2014  NARUSE, Yui  <naruse@ruby-lang.org>
 
 	* configure.in: remove apple-gcc4.2 from CC candidates.
diff --git a/ruby.c b/ruby.c
index d0130ec7d3..e5c4f8f311 100644
--- a/ruby.c
+++ b/ruby.c
@@ -1415,8 +1415,10 @@ process_options(int argc, char **argv, struct cmdline_options *opt)
 	    eenc = lenc;
 	}
 	rb_enc_associate(opt->e_script, eenc);
-        ruby_set_script_name(opt->script_name);
-	require_libraries(&opt->req_list);
+	if (!(opt->dump & ~DUMP_BIT(version_v))) {
+	    ruby_set_script_name(opt->script_name);
+	    require_libraries(&opt->req_list);
+	}
         ruby_set_script_name(progname);
 
 	PREPARE_PARSE_MAIN({
@@ -1612,8 +1614,10 @@ load_file_internal2(VALUE argp_v)
 	    if (f != rb_stdin) rb_io_close(f);
 	    f = Qnil;
 	}
-        ruby_set_script_name(opt->script_name);
-	require_libraries(&opt->req_list);	/* Why here? unnatural */
+	if (!(opt->dump & ~DUMP_BIT(version_v))) {
+	    ruby_set_script_name(opt->script_name);
+	    require_libraries(&opt->req_list);	/* Why here? unnatural */
+	}
     }
     if (opt->src.enc.index >= 0) {
 	enc = rb_enc_from_index(opt->src.enc.index);
diff --git a/test/ruby/test_rubyoptions.rb b/test/ruby/test_rubyoptions.rb
index d4e5b2ac9c..ac7cc7b210 100644
--- a/test/ruby/test_rubyoptions.rb
+++ b/test/ruby/test_rubyoptions.rb
@@ -710,4 +710,41 @@ class TestRubyOptions < Test::Unit::TestCase
     bug7157 = '[ruby-core:47967]'
     assert_in_out_err(['-p', '-e', 'sub(/t.*/){"TEST"}'], %[test], %w[TEST], [], bug7157)
   end
+
+  def assert_norun_with_rflag(opt)
+    bug10435 = "[ruby-dev:48712] [Bug #10435]: should not run with #{opt} option"
+    stderr = []
+    Tempfile.create(%w"bug10435- .rb") do |script|
+      dir, base = File.split(script.path)
+      script.puts "abort ':run'"
+      script.close
+      opts = ['-C', dir, '-r', "./#{base}", opt]
+      assert_in_out_err([*opts, '-ep']) do |_, e|
+        stderr.concat(e)
+      end
+      stderr << "---"
+      assert_in_out_err([*opts, base]) do |_, e|
+        stderr.concat(e)
+      end
+    end
+    assert_not_include(stderr, ":run", bug10435)
+  end
+
+  def test_dump_syntax_with_rflag
+    assert_norun_with_rflag('-c')
+    assert_norun_with_rflag('--dump=syntax')
+  end
+
+  def test_dump_yydebug_with_rflag
+    assert_norun_with_rflag('-y')
+    assert_norun_with_rflag('--dump=yydebug')
+  end
+
+  def test_dump_parsetree_with_rflag
+    assert_norun_with_rflag('--dump=parsetree')
+  end
+
+  def test_dump_insns_with_rflag
+    assert_norun_with_rflag('--dump=insns')
+  end
 end