ensure latest log text is correct when appended

test/append-test-log.c

@@ -58,6 +58,15 @@ append_to_empty(TestState *s)
 		0
 	);
 
+	// log should say "foo"
+	print("\t\t\ttext\n");
+	chk_str_eq(
+		s,
+		"ERROR: append_test_log(): append to empty: first_log: text:",
+		test.first_log->text,
+		"foo"
+	);
+
 	// last_log should match first_log
 	print("\t\tlast_log\n");
 	chk_ptr_eq(