From fe2dc919726d17dbe3568f1cb9de34c73b7f1dff Mon Sep 17 00:00:00 2001
From: Vadim Petrochenkov <vadim.petrochenkov@gmail.com>
Date: Wed, 21 Aug 2019 12:53:11 +0300
Subject: [PATCH] Add a regression test for issue #63460

---
 src/test/ui/hygiene/eager-from-opaque-2.rs | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)
 create mode 100644 src/test/ui/hygiene/eager-from-opaque-2.rs

diff --git a/src/test/ui/hygiene/eager-from-opaque-2.rs b/src/test/ui/hygiene/eager-from-opaque-2.rs
new file mode 100644
index 0000000000000..220e5526745c3
--- /dev/null
+++ b/src/test/ui/hygiene/eager-from-opaque-2.rs
@@ -0,0 +1,22 @@
+// Regression test for the issue #63460.
+
+// check-pass
+
+#[macro_export]
+macro_rules! separator {
+    () => { "/" };
+}
+
+#[macro_export]
+macro_rules! concat_separator {
+    ( $e:literal, $($other:literal),+ ) => {
+        concat!($e, $crate::separator!(), $crate::concat_separator!($($other),+))
+    };
+    ( $e:literal ) => {
+        $e
+    }
+}
+
+fn main() {
+    println!("{}", concat_separator!(2, 3, 4))
+}