1 files changed, 5 insertions, 0 deletions
diff --git a/Objects/codeobject.c b/Objects/codeobject.c
index 65b1d25..755d0b8 100644
--- a/Objects/codeobject.c
+++ b/Objects/codeobject.c
@@ -1921,6 +1921,11 @@ static PyMemberDef code_memberlist[] = {
 static PyObject *
 code_getlnotab(PyCodeObject *code, void *closure)
 {
+    if (PyErr_WarnEx(PyExc_DeprecationWarning,
+                     "co_lnotab is deprecated, use co_lines instead.",
+                     1) < 0) {
+        return NULL;
+    }
     return decode_linetable(code);
 }