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-rw-r--r--clang/test/Preprocessor/macro_paste_c_block_comment.c5
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diff --git a/clang/test/Preprocessor/macro_paste_c_block_comment.c b/clang/test/Preprocessor/macro_paste_c_block_comment.c
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+++ b/clang/test/Preprocessor/macro_paste_c_block_comment.c
@@ -0,0 +1,5 @@
+// RUN: %clang_cc1 %s -Eonly -verify
+
+#define COMM / ## *
+COMM // expected-error {{pasting formed '/*', an invalid preprocessing token}}
+