From 2f1895fa15386fb3cdc91c5604171290828b9da8 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@ruby-lang.org>
Date: Wed, 8 Apr 2020 01:13:03 +0900
Subject: Fixed formatted substring expansion [Bug #16767]

---
 strftime.c | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'strftime.c')

diff --git a/strftime.c b/strftime.c
index 911bcdaf15..15e29e0b7c 100644
--- a/strftime.c
+++ b/strftime.c
@@ -331,7 +331,9 @@ rb_strftime_with_timespec(VALUE ftime, const char *format, size_t format_len,
 			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;	\
-- 
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