1 files changed, 36 insertions, 0 deletions
diff --git a/tests/ui/borrowck/borrowck-macro-interaction-issue-6304.rs b/tests/ui/borrowck/borrowck-macro-interaction-issue-6304.rs
new file mode 100644
index 000000000..4e969f6ed
--- /dev/null
+++ b/tests/ui/borrowck/borrowck-macro-interaction-issue-6304.rs
@@ -0,0 +1,36 @@
+// run-pass
+#![allow(dead_code)]
+#![allow(unused_variables)]
+#![allow(unconditional_recursion)]
+
+// Check that we do not ICE when compiling this
+// macro, which reuses the expression `$id`
+
+#![feature(box_patterns)]
+
+struct Foo {
+  a: isize
+}
+
+pub enum Bar {
+  Bar1, Bar2(isize, Box<Bar>),
+}
+
+impl Foo {
+  fn elaborate_stm(&mut self, s: Box<Bar>) -> Box<Bar> {
+    macro_rules! declare {
+      ($id:expr, $rest:expr) => ({
+        self.check_id($id);
+        Box::new(Bar::Bar2($id, $rest))
+      })
+    }
+    match s {
+      box Bar::Bar2(id, rest) => declare!(id, self.elaborate_stm(rest)),
+      _ => panic!()
+    }
+  }
+
+  fn check_id(&mut self, s: isize) { panic!() }
+}
+
+pub fn main() { }