Check in LLVM r95781.
diff --git a/test/CodeCompletion/truncation.c.h b/test/CodeCompletion/truncation.c.h
new file mode 100644
index 0000000..a5ebbac
--- /dev/null
+++ b/test/CodeCompletion/truncation.c.h
@@ -0,0 +1,5 @@
+struct X { };
+struct Y { };
+
+struct Xa { };
+