diff --git a/testdata/parser/negative/5.pdl b/testdata/parser/negative/5.pdl
new file mode 100644
index 0000000000000000000000000000000000000000..555829b8c5f225b6b63eff1081b3749dab0645db
--- /dev/null
+++ b/testdata/parser/negative/5.pdl
@@ -0,0 +1,6 @@
+#version 100
+
+// unresolved component
+composite main(in a, out b) {
+	sync(a, b);
+}