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Diffstat (limited to 'src/libsystemd-bus/test-bus-marshal.c')
-rw-r--r--src/libsystemd-bus/test-bus-marshal.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/libsystemd-bus/test-bus-marshal.c b/src/libsystemd-bus/test-bus-marshal.c
index 15c472cca0..d12c847f35 100644
--- a/src/libsystemd-bus/test-bus-marshal.c
+++ b/src/libsystemd-bus/test-bus-marshal.c
@@ -50,6 +50,9 @@ int main(int argc, char *argv[]) {
r = sd_bus_message_append(m, "s", "a string");
assert_se(r >= 0);
+ r = sd_bus_message_append(m, "s", NULL);
+ assert_se(r < 0);
+
r = sd_bus_message_append(m, "as", 2, "string #1", "string #2");
assert_se(r >= 0);