1 files changed, 11 insertions, 0 deletions
diff --git a/tests/ui/empty/empty-comment.rs b/tests/ui/empty/empty-comment.rs
new file mode 100644
index 00000000000..174274d28b0
--- /dev/null
+++ b/tests/ui/empty/empty-comment.rs
@@ -0,0 +1,11 @@
+// `/**/` 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
+}