Victor Stinner's patches to check the return result of PyLong_Ssize_t

reviewed by Amaury

Modules/_bytesio.c

@@ -221,6 +221,8 @@ bytesio_read(BytesIOObject *self, PyObject *args)
 
     if (PyInt_Check(arg)) {
         size = PyInt_AsSsize_t(arg);
+        if (size == -1 && PyErr_Occurred())
+            return NULL;
     }
     else if (arg == Py_None) {
         /* Read until EOF is reached, by default. */
@@ -288,6 +290,8 @@ bytesio_readline(BytesIOObject *self, PyObject *args)
 
     if (PyInt_Check(arg)) {
         size = PyInt_AsSsize_t(arg);
+        if (size == -1 && PyErr_Occurred())
+            return NULL;
     }
     else if (arg == Py_None) {
         /* No size limit, by default. */
@@ -332,6 +336,8 @@ bytesio_readlines(BytesIOObject *self, PyObject *args)
 
     if (PyInt_Check(arg)) {
         maxsize = PyInt_AsSsize_t(arg);
+        if (maxsize == -1 && PyErr_Occurred())
+            return NULL;
     }
     else if (arg == Py_None) {
         /* No size limit, by default. */
@@ -415,6 +421,8 @@ bytesio_truncate(BytesIOObject *self, PyObject *args)
 
     if (PyInt_Check(arg)) {
         size = PyInt_AsSsize_t(arg);
+        if (size == -1 && PyErr_Occurred())
+            return NULL;
     }
     else if (arg == Py_None) {
         /* Truncate to current position if no argument is passed. */

Modules/_struct.c

@@ -1755,6 +1755,8 @@ s_pack_into(PyObject *self, PyObject *args)
 
 	/* Extract the offset from the first argument */
 	offset = PyInt_AsSsize_t(PyTuple_GET_ITEM(args, 1));
+	if (offset == -1 && PyErr_Occurred())
+		return NULL;
 
 	/* Support negative offsets. */
 	if (offset < 0)