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// RUN: %clang_cc1 -fsyntax-only %s
// Check that this doesn't crash
#define IDENTITY1(x) x
#define IDENTITY2(x) IDENTITY1(x) IDENTITY1(x) IDENTITY1(x) IDENTITY1(x)
#define IDENTITY3(x) IDENTITY2(x) IDENTITY2(x) IDENTITY2(x) IDENTITY2(x)
#define IDENTITY4(x) IDENTITY3(x) IDENTITY3(x) IDENTITY3(x) IDENTITY3(x)
#define IDENTITY5(x) IDENTITY4(x) IDENTITY4(x) IDENTITY4(x) IDENTITY4(x)
#define IDENTITY6(x) IDENTITY5(x) IDENTITY5(x) IDENTITY5(x) IDENTITY5(x)
#define IDENTITY7(x) IDENTITY6(x) IDENTITY6(x) IDENTITY6(x) IDENTITY6(x)
#define IDENTITY8(x) IDENTITY7(x) IDENTITY7(x) IDENTITY7(x) IDENTITY7(x)
#define IDENTITY9(x) IDENTITY8(x) IDENTITY8(x) IDENTITY8(x) IDENTITY8(x)
#define IDENTITY0(x) IDENTITY9(x) IDENTITY9(x) IDENTITY9(x) IDENTITY9(x)
IDENTITY0()
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