Check in LLVM r95781.
diff --git a/test/Sema/warn-unused-parameters.c b/test/Sema/warn-unused-parameters.c
new file mode 100644
index 0000000..c6458cf
--- /dev/null
+++ b/test/Sema/warn-unused-parameters.c
@@ -0,0 +1,13 @@
+// RUN: %clang -fblocks -fsyntax-only -Wunused-parameter %s -Xclang -verify
+
+int f0(int x,
+ int y, // expected-warning{{unused}}
+ int z __attribute__((unused))) {
+ return x;
+}
+
+void f1() {
+ (void)^(int x,
+ int y, // expected-warning{{unused}}
+ int z __attribute__((unused))) { return x; };
+}