1 files changed, 21 insertions, 0 deletions
diff --git a/src/test/ui/compile-fail-migration/empty-comment.rs b/src/test/ui/compile-fail-migration/empty-comment.rs
new file mode 100644
index 00000000000..a5568ff826b
--- /dev/null
+++ b/src/test/ui/compile-fail-migration/empty-comment.rs
@@ -0,0 +1,21 @@
+// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// `/**/` was previously regarded as a doc comment because it starts with `/**` and ends with `*/`.
+// This could break some internal logic that assumes the length of a doc comment is at least 5,
+// leading to an ICE.
+
+macro_rules! one_arg_macro {
+    ($fmt:expr) => (print!(concat!($fmt, "\n")));
+}
+
+fn main() {
+    one_arg_macro!(/**/); //~ ERROR unexpected end
+}