From fa674cf7230e40bc96625ee97a6057e48bb20f0f Mon Sep 17 00:00:00 2001
From: Jean Boussier <jean.boussier@gmail.com>
Date: Mon, 15 Nov 2021 11:37:40 +0100
Subject: [ruby/date] `Date._<format>(nil)` should return an empty Hash

Fix: https://github.com/ruby/date/issues/39

This is how versions previous to 3.2.1 behaved and Active Support
currently rely on this behavior.

https://github.com/rails/rails/blob/90357af08048ef5076730505f6e7b14a81f33d0c/activesupport/lib/active_support/values/time_zone.rb#L383-L384

Any Rails application upgrading to date `3.2.1` might run into unexpected errors.

https://github.com/ruby/date/commit/8f2d7a0c7e
---
 ext/date/date_core.c | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'ext/date/date_core.c')

diff --git a/ext/date/date_core.c b/ext/date/date_core.c
index e372a12cd7..d1d03fe407 100644
--- a/ext/date/date_core.c
+++ b/ext/date/date_core.c
@@ -4342,6 +4342,8 @@ get_limit(VALUE opt)
 static void
 check_limit(VALUE str, VALUE opt)
 {
+    if (NIL_P(str)) return;
+
     StringValue(str);
     size_t slen = RSTRING_LEN(str);
     size_t limit = get_limit(opt);
-- 
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