Py_ssize_t requires "n" format, this fixes most of the 64-bit only failures.

diff --git a/Modules/_fileio.c b/Modules/_fileio.c
index 60ca8c426f07c6f2254eb3d87bdb729106def2c2..abd5d19836aa94ab14658e85826f909b42e8f87b 100644 (file)
--- a/Modules/_fileio.c
+++ b/Modules/_fileio.c
@@ -438,7 +438,7 @@ fileio_read(PyFileIOObject *self, PyObject *args)
        if (!self->readable)
                return err_mode("reading");
 
-       if (!PyArg_ParseTuple(args, "|i", &size))
+       if (!PyArg_ParseTuple(args, "|n", &size))
                return NULL;
 
         if (size < 0) {