From a673d16b16ec3bfbdbd69a615fa103cb96b1edbe Mon Sep 17 00:00:00 2001
From: Hiroshi SHIBATA <hsbt@ruby-lang.org>
Date: Fri, 6 Jan 2023 11:24:56 +0900
Subject: [PATCH 1/3] ClassLoader can handles Time class

---
 lib/psych/class_loader.rb | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/psych/class_loader.rb b/lib/psych/class_loader.rb
index 50efc35e..939f9d7a 100644
--- a/lib/psych/class_loader.rb
+++ b/lib/psych/class_loader.rb
@@ -17,6 +17,7 @@ class ClassLoader # :nodoc:
     REGEXP      = 'Regexp'
     STRUCT      = 'Struct'
     SYMBOL      = 'Symbol'
+    TIME        = 'Time'
 
     def initialize
       @cache = CACHE.dup

From 0c42229f7abd6f1dff8c18f9a097e171e2628516 Mon Sep 17 00:00:00 2001
From: Hiroshi SHIBATA <hsbt@ruby-lang.org>
Date: Fri, 6 Jan 2023 11:25:46 +0900
Subject: [PATCH 2/3] Relax restricted classes for Psych.load

---
 lib/psych.rb | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/lib/psych.rb b/lib/psych.rb
index a95393c2..96e6fc61 100644
--- a/lib/psych.rb
+++ b/lib/psych.rb
@@ -365,9 +365,10 @@ def self.safe_load yaml, permitted_classes: [], permitted_symbols: [], aliases:
   #   Psych.load("---\n foo: bar", symbolize_names: true)  # => {:foo=>"bar"}
   #
   # Raises a TypeError when `yaml` parameter is NilClass.  This method is
-  # similar to `safe_load` except that `Symbol` objects are allowed by default.
+  # similar to `safe_load` except that `Symbol`, Date, DateTime and Time objects
+  # are allowed by default.
   #
-  def self.load yaml, permitted_classes: [Symbol], permitted_symbols: [], aliases: false, filename: nil, fallback: nil, symbolize_names: false, freeze: false, strict_integer: false
+  def self.load yaml, permitted_classes: [Symbol, Date, DateTime, Time], permitted_symbols: [], aliases: false, filename: nil, fallback: nil, symbolize_names: false, freeze: false, strict_integer: false
     safe_load yaml, permitted_classes: permitted_classes,
                     permitted_symbols: permitted_symbols,
                     aliases: aliases,

From d0ca6fa7c62a99617e1d6576a6e47d0ec4a5ea11 Mon Sep 17 00:00:00 2001
From: Hiroshi SHIBATA <hsbt@ruby-lang.org>
Date: Fri, 6 Jan 2023 11:43:04 +0900
Subject: [PATCH 3/3] Try again with aliases option for permitted classes

---
 test/psych/test_object_references.rb | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/test/psych/test_object_references.rb b/test/psych/test_object_references.rb
index 86bb9034..a3778810 100644
--- a/test/psych/test_object_references.rb
+++ b/test/psych/test_object_references.rb
@@ -36,6 +36,8 @@ def assert_reference_trip obj
       assert_match(/\*-?\d+/, yml)
       begin
         data = Psych.load yml
+      rescue Psych::AliasesNotEnabled
+        data = Psych.load yml, aliases: true
       rescue Psych::DisallowedClass
         data = Psych.unsafe_load yml
       end