promote register space -> primary space, on space reads

src/eval/eval_interpret.c

@@ -206,6 +206,10 @@ e_interpret(String8 bytecode)
           result.code = E_InterpretationCode_BadMemRead;
           goto done;
         }
+        if(e_space_match(selected_space, e_interpret_ctx->reg_space))
+        {
+          selected_space = e_interpret_ctx->primary_space;
+        }
       }break;
       
       case RDI_EvalOp_RegRead: