From 91bd47190402f0fe567dbfb6fcfa17b97c129905 Mon Sep 17 00:00:00 2001
From: jfecher <jake@aztecprotocol.com>
Date: Tue, 28 Mar 2023 23:33:10 +0100
Subject: [PATCH] fix!: Fix returning of structs in ACIR (#1058)

* Fix returning of structs in ACIR

* fmt
---
 .../noirc_evaluator/src/ssa/acir_gen/operations/return.rs   | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/crates/noirc_evaluator/src/ssa/acir_gen/operations/return.rs b/crates/noirc_evaluator/src/ssa/acir_gen/operations/return.rs
index 4ebbbe0eef4..7b99b98c45e 100644
--- a/crates/noirc_evaluator/src/ssa/acir_gen/operations/return.rs
+++ b/crates/noirc_evaluator/src/ssa/acir_gen/operations/return.rs
@@ -53,7 +53,11 @@ pub(crate) fn evaluate(
             witnesses.push(witness);
         }
         evaluator.public_inputs.extend(witnesses.clone());
-        evaluator.param_witnesses.insert(MAIN_RETURN_NAME.to_owned(), witnesses);
+        evaluator
+            .param_witnesses
+            .entry(MAIN_RETURN_NAME.to_owned())
+            .or_default()
+            .append(&mut witnesses);
     }
 
     Ok(None)