https://git.ruby-lang.org/ruby.git/commit/?id=7b4b5e0840

From 7b4b5e08409f1df2a99c00d40f4859b584cd1dd6 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@r...>
Date: Mon, 17 Aug 2020 22:29:51 +0900
Subject: Fixed the radix for control chars


diff --git a/ext/objspace/objspace_dump.c b/ext/objspace/objspace_dump.c
index 2659404..81e490f 100644
--- a/ext/objspace/objspace_dump.c
+++ b/ext/objspace/objspace_dump.c
@@ -87,7 +87,7 @@ dump_append_string_value(struct dump_config *dc, VALUE obj) https://github.com/ruby/ruby/blob/trunk/ext/objspace/objspace_dump.c#L87
 	    break;
 	  default:
 	    if (c <= 0x1f)
-		dump_append(dc, "\\u%04d", c);
+		dump_append(dc, "\\u%04x", c);
 	    else
 		dump_append(dc, "%c", c);
 	}
diff --git a/test/objspace/test_objspace.rb b/test/objspace/test_objspace.rb
index a224263..9d05a4c 100644
--- a/test/objspace/test_objspace.rb
+++ b/test/objspace/test_objspace.rb
@@ -275,6 +275,10 @@ class TestObjSpace < Test::Unit::TestCase https://github.com/ruby/ruby/blob/trunk/test/objspace/test_objspace.rb#L275
     JSON.parse(info) if defined?(JSON)
   end
 
+  def test_dump_control_char
+    assert_include(ObjectSpace.dump("\x0f"), '"value":"\u000f"')
+  end
+
   def test_dump_special_consts
     # [ruby-core:69692] [Bug #11291]
     assert_equal('null', ObjectSpace.dump(nil))
-- 
cgit v0.10.2


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