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-rw-r--r--test/Preprocessor/header_is_main_file.c8
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diff --git a/test/Preprocessor/header_is_main_file.c b/test/Preprocessor/header_is_main_file.c
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+// RUN: %clang_cc1 -x c-header -ffreestanding -Eonly -verify %s
+// expected-no-diagnostics
+
+#pragma once
+#include_next "stdint.h"
+#if !__has_include_next("stdint.h")
+#error "__has_include_next failed"
+#endif