* io.c (fptr_finalize): clear errno first. [ruby-talk:284492]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@14858 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,7 @@
+Thu Jan  3 11:28:58 2008  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* io.c (fptr_finalize): clear errno first.  [ruby-talk:284492]
+
 Thu Jan  3 05:02:36 2008  Tanaka Akira  <akr@fsij.org>
 
 	* enc/us_ascii.c: add us_ascii_ prefix for functions to ease

io.c

@@ -2169,6 +2169,7 @@ rb_io_each_byte(VALUE io)
 	    fptr->rbuf_len--;
 	    rb_yield(INT2FIX(*p & 0xff));
 	    p++;
+    errno = 0;
 	}
 	rb_io_check_readable(fptr);
 	READ_CHECK(fptr);