diff --git a/src/protocol/eval/value.rs b/src/protocol/eval/value.rs
index 6d6a618e386fa47a56189146f6ebd208a4608d7f..00d546ed6bc96ec19ea274d58225d0ea273773cf 100644
--- a/src/protocol/eval/value.rs
+++ b/src/protocol/eval/value.rs
@@ -1,3 +1,4 @@
+use std::collections::VecDeque;
 
 use super::store::*;
 use crate::PortId;
@@ -160,7 +161,7 @@ impl Value {
 ///
 /// Again: this is a temporary thing, hopefully removed once we move to a
 /// bytecode interpreter.
-#[derive(Clone)]
+#[derive(Clone, Debug)]
 pub struct ValueGroup {
     pub(crate) values: Vec<Value>,
     pub(crate) regions: Vec<Vec<Value>>
@@ -230,6 +231,17 @@ impl ValueGroup {
         }
     }
 
+    /// Transfers the heap values into the store, but will put the stack values
+    /// into the provided `VecDeque`. This is mainly used to merge `ValueGroup`
+    /// instances retrieved by the code by `get` calls into the expression
+    /// stack.
+    pub(crate) fn into_stack(self, stack: &mut VecDeque<Value>, store: &mut Store) {
+        for value in &self.values {
+            let transferred = self.provide_value(value, store);
+            stack.push_back(transferred);
+        }
+    }
+
     fn provide_value(&self, value: &Value, to_store: &mut Store) -> Value {
         if let Some(from_heap_pos) = value.get_heap_pos() {
             let from_heap_pos = from_heap_pos as usize;