io.c (rb_io_syswrite): add RB_GC_GUARD

* io.c (rb_io_syswrite): add RB_GC_GUARD
  [Bug #9472][ruby-core:60407]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@44790 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

2 files changed, 6 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index 461b907313..bd64e0ea5d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Sun Feb 2 05:48:42 2014  Eric Wong <e@80x24.org>
+
+	* io.c (rb_io_syswrite): add RB_GC_GUARD
+	  [Bug #9472][ruby-core:60407]
+
 Sat Feb  1 15:09:16 2014  Masaki Suketa <masaki.suketa@nifty.ne.jp>
 
 	* ext/win32ole/win32ole.c (ole_typedesc2val): add VT_RECORD case.
diff --git a/io.c b/io.c
index 0020f4704a..1d9f87eb5f 100644
--- a/io.c
+++ b/io.c
@@ -4682,6 +4682,7 @@ rb_io_syswrite(VALUE io, VALUE str)
     }
 
     n = rb_write_internal(fptr->fd, RSTRING_PTR(str), RSTRING_LEN(str));
+    RB_GC_GUARD(str);
 
     if (n == -1) rb_sys_fail_path(fptr->pathv);