Index: salsa/src/accumulator/accumulated_map.rs
===================================================================
--- salsa.orig/src/accumulator/accumulated_map.rs
+++ salsa/src/accumulator/accumulated_map.rs
@@ -52,7 +52,9 @@ impl AccumulatedMap {
     }
 
     pub fn allocation_size(&self) -> usize {
-        self.map.allocation_size()
+        // allocation_size() is not available in older hashbrown versions
+        // Return an approximation based on capacity
+        self.map.capacity() * std::mem::size_of::<(IngredientIndex, Box<dyn AnyAccumulated>)>()
     }
 }