* ext/stringio/stringio.c: keep holding string after closed.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@8968 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,7 @@
+Thu Aug 11 23:29:03 2005  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* ext/stringio/stringio.c: keep holding string after closed.
+
 Thu Aug 11 13:01:48 2005  Kouhei Sutou  <kou@cozmixng.org>
 
 	* lib/rss: fixed sort bug. [ruby-list:41018]
@@ -46,9 +50,9 @@ Wed Aug 10 10:38:50 2005  Yukihiro Matsumoto  <matz@ruby-lang.org>
 
 Wed Aug 10 10:29:40 2005  Hidetoshi NAGAI  <nagai@ai.kyutech.ac.jp>
 
-	* ext/tk/lib/tk.rb: fix bug on handling __ruby2val_optkeys(). 
+	* ext/tk/lib/tk.rb: fix bug on handling __ruby2val_optkeys().
 
-	* ext/tk/lib/tk/itemconfig.rb: fix bug on handling 
+	* ext/tk/lib/tk/itemconfig.rb: fix bug on handling
 	  __item_ruby2val_optkeys().
 
 	* ext/tk/lib/tk/canvas.rb: didn't check __item_ruby2val_optkeys().

ext/stringio/stringio.c

@@ -382,10 +382,9 @@ strio_close(self)
     VALUE self;
 {
     struct StringIO *ptr = StringIO(self);
-    if (CLOSED(ptr)) {
+    if (CLOSED(ptr) || !(ptr->flags & FMODE_READWRITE)) {
 	rb_raise(rb_eIOError, "closed stream");
     }
-    ptr->string = Qnil;
     ptr->flags &= ~FMODE_READWRITE;
     return Qnil;
 }
@@ -405,9 +404,7 @@ strio_close_read(self)
     if (!READABLE(ptr)) {
 	rb_raise(rb_eIOError, "closing non-duplex IO for reading");
     }
-    if (!((ptr->flags &= ~FMODE_READABLE) & FMODE_READWRITE)) {
-	ptr->string = Qnil;
-    }
+    ptr->flags &= ~FMODE_READABLE;
     return Qnil;
 }
 
@@ -426,9 +423,7 @@ strio_close_write(self)
     if (!WRITABLE(ptr)) {
 	rb_raise(rb_eIOError, "closing non-duplex IO for writing");
     }
-    if (!((ptr->flags &= ~FMODE_WRITABLE) & FMODE_READWRITE)) {
-	ptr->string = Qnil;
-    }
+    ptr->flags &= ~FMODE_WRITABLE;
     return Qnil;
 }