diff -prU2 Modules/_io/textio.c Modules/_io/textio.c
--- Modules/_io/textio.c
+++ Modules/_io/textio.c
@@ -191,6 +191,6 @@ typedef struct {
 PyObject *decoder;
 PyObject *errors;
- signed int pendingcr: 1;
- signed int translate: 1;
+ unsigned int pendingcr: 1;
+ unsigned int translate: 1;
 unsigned int seennl: 3;
 } nldecoder_object;
@@ -511,5 +511,5 @@ incrementalnewlinedecoder_setstate(nldec
 return NULL;
 
- self->pendingcr = (int) flag & 1;
+ self->pendingcr = (int) (flag & 1);
 flag>>= 1;
 
</div><div class="naked_ctrl">
<form action="/index.cgi/contrast" method="get" name="gate">
<p><a href="http://altstyle.alfasado.net">AltStyle</a> によって変換されたページ <a href="https://bugs.python.org/file19487/signed-1-bitfield.diff">(-&gt;オリジナル)</a>
/ <label>アドレス: <input type="text" name="naked_post_url" value="https://bugs.python.org/file19487/signed-1-bitfield.diff" size="22" /></label> <label>モード: <select name="naked_post_mode">
<option value="default">デフォルト</option>
<option value="speech">音声ブラウザ</option>
<option value="ruby">ルビ付き</option>
<option value="contrast" selected="selected">配色反転</option>
<option value="larger-text">文字拡大</option>
<option value="mobile">モバイル</option>
</select>
<input type="submit" value="表示" />
</p>
</form>
</div>