From 520a734ad9c7348f4e4858ee24640f42c88fd389 Mon Sep 17 00:00:00 2001
From: Jeremy Evans <code@jeremyevans.net>
Date: Fri, 24 Jul 2020 15:21:08 -0700
Subject: Fix Time#ceil when result should be the same as the receiver

Fixes [Bug #17025]
---
 time.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'time.c')

diff --git a/time.c b/time.c
index 51b7a262ac..3073e154c9 100644
--- a/time.c
+++ b/time.c
@@ -4446,7 +4446,10 @@ time_ceil(int argc, VALUE *argv, VALUE time)
     v = w2v(rb_time_unmagnify(tobj->timew));
 
     v = modv(v, den);
-    return time_add(tobj, time, subv(den, v), 1);
+    if (!rb_equal(v, INT2FIX(0))) {
+        v = subv(den, v);
+    }
+    return time_add(tobj, time, v, 1);
 }
 
 /*
-- 
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