https://git.ruby-lang.org/ruby.git/commit/?id=b67fae3712

From b67fae3712b782c7910a2b85ef7302eda7562c25 Mon Sep 17 00:00:00 2001
From: usa <usa@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Tue, 27 Aug 2019 05:02:29 +0000
Subject: Revert a part of r67767 it was not necessary for ruby_2_5.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_5@67776 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

diff --git a/string.c b/string.c
index 1f52f26..ed7da23 100644
--- a/string.c
+++ b/string.c
@@ -1136,13 +1136,6 @@ str_replace_shared_without_enc(VALUE str2, VALUE str) https://github.com/ruby/ruby/blob/trunk/string.c#L1136
             root = rb_str_new_frozen(str);
             RSTRING_GETMEM(root, ptr, len);
         }
-        if (!STR_EMBED_P(str2) && !FL_TEST_RAW(str2, STR_SHARED|STR_NOFREE)) {
-            /* TODO: check if str2 is a shared root */
-            char *ptr2 = STR_HEAP_PTR(str2);
-            if (ptr2 != ptr) {
-                ruby_sized_xfree(ptr2, STR_HEAP_SIZE(str2));
-            }
-        }
 	FL_SET(str2, STR_NOEMBED);
 	RSTRING(str2)->as.heap.len = len;
 	RSTRING(str2)->as.heap.ptr = ptr;
diff --git a/version.h b/version.h
index 0abdcb4..c4da852 100644
--- a/version.h
+++ b/version.h
@@ -1,6 +1,6 @@ https://github.com/ruby/ruby/blob/trunk/version.h#L1
 #define RUBY_VERSION "2.5.6"
 #define RUBY_RELEASE_DATE "2019-08-27"
-#define RUBY_PATCHLEVEL 194
+#define RUBY_PATCHLEVEL 195
 
 #define RUBY_RELEASE_YEAR 2019
 #define RUBY_RELEASE_MONTH 8
-- 
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