CLOSURE_EXPRESSION  350 create.c           exp = crb_alloc_expression(CLOSURE_EXPRESSION);
CLOSURE_EXPRESSION  355 eval.c             case CLOSURE_EXPRESSION:	/* FALLTHRU */
CLOSURE_EXPRESSION  435 eval.c             case CLOSURE_EXPRESSION:	/* FALLTHRU */
CLOSURE_EXPRESSION 1530 eval.c             case CLOSURE_EXPRESSION: