https://git.ruby-lang.org/ruby.git/commit/?id=2e9626fddd

From 2e9626fddd168bd12352b4f5dc3412c6a33ce44e Mon Sep 17 00:00:00 2001
From: nagachika <nagachika@r...>
Date: Sat, 25 Jul 2020 11:56:28 +0900
Subject: merge revision(s) 2f1895fa15386fb3cdc91c5604171290828b9da8: [Backport
 #16767]

	Fixed formatted substring expansion [Bug #16767]

diff --git a/strftime.c b/strftime.c
index dd2b21f..446be7d 100644
--- a/strftime.c
+++ b/strftime.c
@@ -326,7 +326,9 @@ rb_strftime_with_timespec(VALUE ftime, const char *format, size_t format_len, https://github.com/ruby/ruby/blob/trunk/strftime.c#L326
 			s += len; \
 			if (i > 0) case_conv(s, i, flags); \
 			if (precision > i) {\
+				s += i; \
 				NEEDS(precision); \
+				s -= i; \
 				memmove(s + precision - i, s, i);\
 				memset(s, padding ? padding : ' ', precision - i); \
 				s += precision;	\
diff --git a/test/ruby/test_time.rb b/test/ruby/test_time.rb
index 35e3172..ad8fe6c 100644
--- a/test/ruby/test_time.rb
+++ b/test/ruby/test_time.rb
@@ -885,6 +885,13 @@ class TestTime < Test::Unit::TestCase https://github.com/ruby/ruby/blob/trunk/test/ruby/test_time.rb#L885
     assert_equal(8192, Time.now.strftime('%8192z').size)
   end
 
+  def test_strftime_wide_precision
+    t2000 = get_t2000
+    s = t2000.strftime("%28c")
+    assert_equal(28, s.size)
+    assert_equal(t2000.strftime("%c"), s.strip)
+  end
+
   def test_strfimte_zoneoffset
     t2000 = get_t2000
     t = t2000.getlocal("+09:00:00")
diff --git a/version.h b/version.h
index 269f278..d3dae72 100644
--- a/version.h
+++ b/version.h
@@ -2,11 +2,11 @@ https://github.com/ruby/ruby/blob/trunk/version.h#L2
 # define RUBY_VERSION_MINOR RUBY_API_VERSION_MINOR
 #define RUBY_VERSION_TEENY 1
 #define RUBY_RELEASE_DATE RUBY_RELEASE_YEAR_STR"-"RUBY_RELEASE_MONTH_STR"-"RUBY_RELEASE_DAY_STR
-#define RUBY_PATCHLEVEL 107
+#define RUBY_PATCHLEVEL 108
 
 #define RUBY_RELEASE_YEAR 2020
 #define RUBY_RELEASE_MONTH 7
-#define RUBY_RELEASE_DAY 23
+#define RUBY_RELEASE_DAY 25
 
 #include "ruby/version.h"
 
-- 
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