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-rw-r--r--src/nm-config-data.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/nm-config-data.c b/src/nm-config-data.c
index 1702b551..28057b47 100644
--- a/src/nm-config-data.c
+++ b/src/nm-config-data.c
@@ -1201,6 +1201,8 @@ nm_config_data_diff (NMConfigData *old_data, NMConfigData *new_data)
 	if (!global_dns_equal (priv_old->global_dns, priv_new->global_dns))
 		changes |= NM_CONFIG_CHANGE_GLOBAL_DNS_CONFIG;
 
+	nm_assert (!NM_FLAGS_ANY (changes, NM_CONFIG_CHANGE_CAUSES));
+
 	return changes;
 }