Ticket #17988: model_formset_check_commit_before_delete.diff

django/forms/models.py

@@ -607 +607 @@
             obj = self._existing_object(pk_value)
             if self.can_delete and self._should_delete_form(form):
                 self.deleted_objects.append(obj)
-                obj.delete()
+                if commit:
+                    obj.delete()
                 continue
             if form.has_changed():
                 self.changed_objects.append((obj, form.changed_data))