1 files changed, 9 insertions, 2 deletions

diff --git a/crates/hir_def/src/body/lower.rs b/crates/hir_def/src/body/lower.rs
index 30ac12a12..2d91bb21f 100644
--- a/crates/hir_def/src/body/lower.rs
+++ b/crates/hir_def/src/body/lower.rs
@@ -239,7 +239,10 @@ impl ExprCollector<'_> {
                     None => self.missing_expr(),
                 },
                 // FIXME: we need to record these effects somewhere...
-                ast::Effect::Async(_) => self.collect_block_opt(e.block_expr()),
+                ast::Effect::Async(_) => {
+                    let body = self.collect_block_opt(e.block_expr());
+                    self.alloc_expr(Expr::Async { body }, syntax_ptr)
+                }
             },
             ast::Expr::BlockExpr(e) => self.collect_block(e),
             ast::Expr::LoopExpr(e) => {
@@ -835,8 +838,12 @@ impl ExprCollector<'_> {
 
                 Pat::Missing
             }
+            ast::Pat::BoxPat(boxpat) => {
+                let inner = self.collect_pat_opt(boxpat.pat());
+                Pat::Box { inner }
+            }
             // FIXME: implement
-            ast::Pat::BoxPat(_) | ast::Pat::RangePat(_) | ast::Pat::MacroPat(_) => Pat::Missing,
+            ast::Pat::RangePat(_) | ast::Pat::MacroPat(_) => Pat::Missing,
         };
         let ptr = AstPtr::new(&pat);
         self.alloc_pat(pattern, Either::Left(ptr))