* ext/nkf/nkf.c (rb_nkf_convert): avoid GC.

reported in [ruby-dev:36909] and patched [ruby-dev:36941] by mame.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@19953 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,8 @@
+Mon Oct 27 01:05:48 2008  NARUSE, Yui  <naruse@ruby-lang.org>
+
+	* ext/nkf/nkf.c (rb_nkf_convert): avoid GC.
+	  reported in [ruby-dev:36909] and patched [ruby-dev:36941] by mame.
+
 Sun Oct 26 21:28:42 2008  Yusuke Endoh  <mame@tsg.ne.jp>
 
 	* test/json/test_json.rb: remove dependency on permutation gem.

ext/nkf/nkf.c

@@ -135,6 +135,7 @@ int nkf_split_options(const char *arg)
 static VALUE
 rb_nkf_convert(VALUE obj, VALUE opt, VALUE src)
 {
+    volatile tmp;
     reinit();
     StringValue(opt);
     nkf_split_options(RSTRING_PTR(opt));
@@ -155,7 +156,7 @@ rb_nkf_convert(VALUE obj, VALUE opt, VALUE src)
     StringValue(src);
     input = (unsigned char *)RSTRING_PTR(src);
     i_len = RSTRING_LEN(src);
-    result = rb_str_new(0, i_len*3 + 10);
+    tmp = result = rb_str_new(0, i_len*3 + 10);
 
     output_ctr = 0;
     output     = (unsigned char *)RSTRING_PTR(result);