Fix ubsan

cmaloney · cmaloney · commit a1daaae26094 · 2025-11-13T15:34:04.000-08:00
diff --git a/Modules/_io/iobase.c b/Modules/_io/iobase.c
@@ -949,7 +949,7 @@ _io__RawIOBase_read_impl(PyObject *self, Py_ssize_t n)
         goto cleanup;
     }
 
-    res = PyObject_CallMethod(b, "resize", "i", bytes_filled);
+    res = PyObject_CallMethod(b, "resize", "n", bytes_filled);
     if (res != Py_None) {
         if (res != NULL) {
             PyErr_Format(PyExc_ValueError,

Original file line number	Diff line number	Diff line change
`@@ -949,7 +949,7 @@ _io__RawIOBase_read_impl(PyObject *self, Py_ssize_t n)`
`949`	`949`	`goto cleanup;`
`950`	`950`	`}`
`951`	`951`
`952`		`- res = PyObject_CallMethod(b, "resize", "i", bytes_filled);`
	`952`	`+ res = PyObject_CallMethod(b, "resize", "n", bytes_filled);`
`953`	`953`	`if (res != Py_None) {`
`954`	`954`	`if (res != NULL) {`
`955`	`955`	`PyErr_Format(PyExc_ValueError,`