diff --git "a/.\\Python-3.5.0rc1/Modules/_io/bytesio.c" "b/.\\Python-3.5.0rc1/Modules/_io/bytesio.c"
index d46430d..c1321d5 100644
--- "a/.\\Python-3.5.0rc1/Modules/_io/bytesio.c"
+++ "b/.\\Python-3.5.0rc1/Modules/_io/bytesio.c"
@@ -46,6 +46,7 @@ typedef struct {
 
 #define SHARED_BUF(self) (Py_REFCNT((self)->buf) > 1)
 
+#define GET_BYTES_SIZE(self) ((size_t)PyBytes_GET_SIZE((self)->buf))
 
 /* Internal routine to get a line from the buffer of a BytesIO
    object. Returns the length between the current position to the
@@ -58,6 +59,9 @@ scan_eol(bytesio *self, Py_ssize_t len)
 
     assert(self->buf != NULL);
 
+	if (self->pos >= GET_BYTES_SIZE(self))
+		return 0;
+
     /* Move to the end of the line, up to the end of the string, s. */
     start = PyBytes_AS_STRING(self->buf) + self->pos;
     maxlen = self->string_size - self->pos;