diff --git a/include/xo/interpreter2/detail/IRuntimeContext_DVsmRcx.hpp b/include/xo/interpreter2/detail/IRuntimeContext_DVsmRcx.hpp
index 1eddf28c..d87596e6 100644
--- a/include/xo/interpreter2/detail/IRuntimeContext_DVsmRcx.hpp
+++ b/include/xo/interpreter2/detail/IRuntimeContext_DVsmRcx.hpp
@@ -52,6 +52,8 @@ namespace xo {
             static obj<AAllocator> allocator(const DVsmRcx & self) noexcept;
             /** collector facet for allocator. If non-null, same data pointer as allocator **/
             static obj<ACollector> collector(const DVsmRcx & self) noexcept;
+            /** last-resort allocator for erros. e.g. regular allocator exhausted **/
+            static obj<AAllocator> error_allocator(const DVsmRcx & self) noexcept;
             /** stringtable for unique symbols **/
             static StringTable * stringtable(const DVsmRcx & self) noexcept;
             /** invoke visitor for each distinct memory pool **/
diff --git a/src/interpreter2/IRuntimeContext_DVsmRcx.cpp b/src/interpreter2/IRuntimeContext_DVsmRcx.cpp
index 9b1a73d0..b2259c75 100644
--- a/src/interpreter2/IRuntimeContext_DVsmRcx.cpp
+++ b/src/interpreter2/IRuntimeContext_DVsmRcx.cpp
@@ -27,6 +27,12 @@ namespace xo {
             return self.collector();
         }
 
+        auto
+        IRuntimeContext_DVsmRcx::error_allocator(const DVsmRcx & self) noexcept -> obj<AAllocator>
+        {
+            return self.error_allocator();
+        }
+
         auto
         IRuntimeContext_DVsmRcx::stringtable(const DVsmRcx & self) noexcept -> StringTable *
         {