1 files changed, 8 insertions, 0 deletions
diff --git a/gcc/rust/hir/rust-ast-lower-expr.cc b/gcc/rust/hir/rust-ast-lower-expr.cc
index 35d542b..3b462ee 100644
--- a/gcc/rust/hir/rust-ast-lower-expr.cc
+++ b/gcc/rust/hir/rust-ast-lower-expr.cc
@@ -24,6 +24,7 @@
 #include "rust-ast-lower-type.h"
 #include "rust-ast.h"
 #include "rust-diagnostics.h"
+#include "rust-system.h"
 
 namespace Rust {
 namespace HIR {
@@ -142,6 +143,13 @@ ASTLoweringExpr::visit (AST::QualifiedPathInExpression &expr)
 }
 
 void
+ASTLoweringExpr::visit (AST::BoxExpr &expr)
+{
+  // Not implemented
+  rust_unreachable ();
+}
+
+void
 ASTLoweringExpr::visit (AST::ReturnExpr &expr)
 {
   terminated = true;