https://git.ruby-lang.org/ruby.git/commit/?id=68903df6f6

From 68903df6f6fc548f3bf68fb09ee8b2495dcd28f0 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@r...>
Date: Mon, 18 Jul 2022 00:59:27 +0900
Subject: [Bug #18922] Normalize time at 24:00:00 UTC

---
 test/ruby/test_time.rb |  2 ++
 time.c                 | 14 ++++++++++++++
 2 files changed, 16 insertions(+)

diff --git a/test/ruby/test_time.rb b/test/ruby/test_time.rb
index 8300681fe5..4af4cf5474 100644
--- a/test/ruby/test_time.rb
+++ b/test/ruby/test_time.rb
@@ -53,6 +53,8 @@ class TestTime < Test::Unit::TestCase https://github.com/ruby/ruby/blob/trunk/test/ruby/test_time.rb#L53
     assert_raise_with_message(ArgumentError, msg) { Time.new(2021, 1, 1, "+09:99") }
     assert_raise_with_message(ArgumentError, msg) { Time.new(2021, 1, "+09:99") }
     assert_raise_with_message(ArgumentError, msg) { Time.new(2021, "+09:99") }
+
+    assert_equal([0, 0, 0, 2, 1, 2000], Time.new(2000, 1, 1, 24, 0, 0, "-00:00").to_a[0, 6])
   end
 
   def test_time_add()
diff --git a/time.c b/time.c
index 56dfb5d8a3..b03baa2c22 100644
--- a/time.c
+++ b/time.c
@@ -654,6 +654,7 @@ static uint32_t month_arg(VALUE arg); https://github.com/ruby/ruby/blob/trunk/time.c#L654
 static VALUE validate_utc_offset(VALUE utc_offset);
 static VALUE validate_zone_name(VALUE zone_name);
 static void validate_vtm(struct vtm *vtm);
+static void vtm_add_day(struct vtm *vtm, int day);
 static uint32_t obj2subsecx(VALUE obj, VALUE *subsecx);
 
 static VALUE time_gmtime(VALUE);
@@ -2032,6 +2033,12 @@ vtm_add_offset(struct vtm *vtm, VALUE off, int sign) https://github.com/ruby/ruby/blob/trunk/time.c#L2033
         vtm->hour = hour;
     }
 
+    vtm_add_day(vtm, day);
+}
+
+static void
+vtm_add_day(struct vtm *vtm, int day)
+{
     if (day) {
         if (day < 0) {
             if (vtm->mon == 1 && vtm->mday == 1) {
@@ -2393,6 +2400,13 @@ time_init_args(rb_execution_context_t *ec, VALUE time, VALUE year, VALUE mon, VA https://github.com/ruby/ruby/blob/trunk/time.c#L2400
 
     if (utc == UTC_ZONE) {
         tobj->timew = timegmw(&vtm);
+        if (vtm.hour == 24) { /* special case: 24:00:00 only */
+            /* Since no need to take care of DST in UTC, just reset
+             * hour and advance date, not to discard the validated
+             * vtm. */
+            vtm.hour = 0;
+            vtm_add_day(&vtm, 1);
+        }
         tobj->vtm = vtm;
         tobj->tm_got = 1;
         TZMODE_SET_UTC(tobj);
-- 
cgit v1.2.1


--
ML: ruby-changes@q...
Info: http://www.atdot.net/~ko1/quickml/