Issue #25558: Use compile-time asserts.
diff --git a/Modules/pyexpat.c b/Modules/pyexpat.c
index 9a6da73..b45e3da 100644
--- a/Modules/pyexpat.c
+++ b/Modules/pyexpat.c
@@ -747,7 +747,8 @@
         s += MAX_CHUNK_SIZE;
         slen -= MAX_CHUNK_SIZE;
     }
-    assert(MAX_CHUNK_SIZE < INT_MAX && slen < INT_MAX);
+    Py_BUILD_ASSERT(MAX_CHUNK_SIZE <= INT_MAX);
+    assert(slen <= INT_MAX);
     rc = XML_Parse(self->itself, s, (int)slen, isfinal);
 
 done: