4 files changed, 14 insertions, 4 deletions
diff --git a/ChangeLog b/ChangeLog
index 00345de230..d463ec6c3b 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+Tue Feb 17 11:50:06 2015  Yusuke Endoh  <mame@tsg.ne.jp>
+
+	* string.c (str_discard): does not free for STR_NOFREE string.
+	  [Bug #10853][ruby-core:68110]
+
+	* bootstraptest/test_string.rb: test for above.
+
 Sun Feb 15 13:15:46 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* ext/socket/getaddrinfo.c (get_addr): reject too long hostname to
diff --git a/bootstraptest/test_string.rb b/bootstraptest/test_string.rb
new file mode 100644
index 0000000000..849dcd45b0
--- /dev/null
+++ b/bootstraptest/test_string.rb
@@ -0,0 +1,3 @@
+assert_normal_exit %q{
+  inspect.clear
+}, '[ruby-core:68110]'
diff --git a/string.c b/string.c
index 9053835ee2..0fae07d938 100644
--- a/string.c
+++ b/string.c
@@ -1658,7 +1658,7 @@ static inline void
 str_discard(VALUE str)
 {
     str_modifiable(str);
-    if (!STR_SHARED_P(str) && !STR_EMBED_P(str)) {
+    if (!STR_EMBED_P(str) && !FL_TEST(str, STR_SHARED|STR_NOFREE)) {
 	ruby_sized_xfree(STR_HEAP_PTR(str), STR_HEAP_SIZE(str));
 	RSTRING(str)->as.heap.ptr = 0;
 	RSTRING(str)->as.heap.len = 0;
diff --git a/version.h b/version.h
index 04eee75321..82f22dd322 100644
--- a/version.h
+++ b/version.h
@@ -1,10 +1,10 @@
 #define RUBY_VERSION "2.2.0"
-#define RUBY_RELEASE_DATE "2015-02-15"
-#define RUBY_PATCHLEVEL 49
+#define RUBY_RELEASE_DATE "2015-02-17"
+#define RUBY_PATCHLEVEL 50
 
 #define RUBY_RELEASE_YEAR 2015
 #define RUBY_RELEASE_MONTH 2
-#define RUBY_RELEASE_DAY 15
+#define RUBY_RELEASE_DAY 17
 
 #include "ruby/version.h"