diff --git a/Doc/library/exceptions.rst b/Doc/library/exceptions.rst
index 528febd..ca3ad3e 100644
--- a/Doc/library/exceptions.rst
+++ b/Doc/library/exceptions.rst
@@ -40,9 +40,9 @@
 
    The base class for all built-in exceptions.  It is not meant to be directly
    inherited by user-defined classes (for that, use :exc:`Exception`).  If
-   :func:`bytes` or :func:`str` is called on an instance of this class, the
-   representation of the argument(s) to the instance are returned, or the empty
-   string when there were no arguments.
+   :func:`str` is called on an instance of this class, the representation of
+   the argument(s) to the instance are returned, or the empty string when
+   there were no arguments.
 
    .. attribute:: args
 
diff --git a/Lib/test/test_ast.py b/Lib/test/test_ast.py
index 2ba3ea5..be9f05e 100644
--- a/Lib/test/test_ast.py
+++ b/Lib/test/test_ast.py
@@ -486,6 +486,17 @@
         self.assertEqual(ast.literal_eval('10 + 2j'), 10 + 2j)
         self.assertEqual(ast.literal_eval('1.5 - 2j'), 1.5 - 2j)
 
+    def test_bad_integer(self):
+        # issue13436: Bad error message with invalid numeric values
+        body = [ast.ImportFrom(module='time',
+                               names=[ast.alias(name='sleep')],
+                               level=None,
+                               lineno=None, col_offset=None)]
+        mod = ast.Module(body)
+        with self.assertRaises(ValueError) as cm:
+            compile(mod, 'test', 'exec')
+        self.assertIn("invalid integer value: None", str(cm.exception))
+
 
 def test_main():
     support.run_unittest(AST_Tests, ASTHelpers_Test)
diff --git a/Misc/NEWS b/Misc/NEWS
index 7992e8b..6350818 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -10,6 +10,9 @@
 Core and Builtins
 -----------------
 
+- Issue #13436: Fix a bogus error message when an AST object was passed
+  an invalid integer value.
+
 - Issue #13338: Handle all enumerations in _Py_ANNOTATE_MEMORY_ORDER
   to allow compiling extension modules with -Wswitch-enum on gcc.
   Initial patch by Floris Bruynooghe.
diff --git a/Parser/asdl_c.py b/Parser/asdl_c.py
index 249e18d..b85c07e 100755
--- a/Parser/asdl_c.py
+++ b/Parser/asdl_c.py
@@ -816,11 +816,7 @@
 {
     int i;
     if (!PyLong_Check(obj)) {
-        PyObject *s = PyObject_Repr(obj);
-        if (s == NULL) return 1;
-        PyErr_Format(PyExc_ValueError, "invalid integer value: %.400s",
-                     PyBytes_AS_STRING(s));
-        Py_DECREF(s);
+        PyErr_Format(PyExc_ValueError, "invalid integer value: %R", obj);
         return 1;
     }
 
diff --git a/Python/Python-ast.c b/Python/Python-ast.c
index 89c07cd..a276b6c 100644
--- a/Python/Python-ast.c
+++ b/Python/Python-ast.c
@@ -622,11 +622,7 @@
 {
     int i;
     if (!PyLong_Check(obj)) {
-        PyObject *s = PyObject_Repr(obj);
-        if (s == NULL) return 1;
-        PyErr_Format(PyExc_ValueError, "invalid integer value: %.400s",
-                     PyBytes_AS_STRING(s));
-        Py_DECREF(s);
+        PyErr_Format(PyExc_ValueError, "invalid integer value: %R", obj);
         return 1;
     }