CLOSURE_EXPRESSION  349 create.c           exp = crb_alloc_expression(CLOSURE_EXPRESSION);
CLOSURE_EXPRESSION  343 eval.c             case CLOSURE_EXPRESSION:	/* FALLTHRU */
CLOSURE_EXPRESSION  422 eval.c             case CLOSURE_EXPRESSION:	/* FALLTHRU */
CLOSURE_EXPRESSION 1412 eval.c             case CLOSURE_EXPRESSION: