Check in LLVM r95781.
diff --git a/test/Preprocessor/macro_disable.c b/test/Preprocessor/macro_disable.c
new file mode 100644
index 0000000..d6509c3
--- /dev/null
+++ b/test/Preprocessor/macro_disable.c
@@ -0,0 +1,13 @@
+// RUN: %clang_cc1 -E %s | grep 'a: 2 + M_0(3)(4)(5);'
+// RUN: %clang_cc1 -E %s | grep 'b: 4 + 4 + 3 + 2 + 1 + M_0(3)(2)(1);'
+
+#define M_0(x) M_ ## x
+#define M_1(x) x + M_0(0)
+#define M_2(x) x + M_1(1)
+#define M_3(x) x + M_2(2)
+#define M_4(x) x + M_3(3)
+#define M_5(x) x + M_4(4)
+
+a: M_0(1)(2)(3)(4)(5);
+b: M_0(5)(4)(3)(2)(1);
+