Use a different map to distinguish eval contexts

src/objects-inl.h

Index: src/objects-inl.h
diff --git a/src/objects-inl.h b/src/objects-inl.h
index d6822a6d09208a77e999f66bf89cea7bac4db96b..7891c84eacd85db0ee579b707c44a06a2a84169c 100644
--- a/src/objects-inl.h
+++ b/src/objects-inl.h
@@ -787,7 +787,7 @@ bool HeapObject::IsContext() const {
       map == heap->function_context_map() || map == heap->catch_context_map() ||
       map == heap->with_context_map() || map == heap->native_context_map() ||
       map == heap->block_context_map() || map == heap->module_context_map() ||
-      map == heap->script_context_map() ||
+      map == heap->eval_context_map() || map == heap->script_context_map() ||
       map == heap->debug_evaluate_context_map());
 }