Constant expression with nested casts causes a compiler crash

SELECT CAST(CAST('32767.4' AS FLOAT) AS SMALLINT)

if ((clazz != Float.class && clazz != Double.class || !(value instanceof BigDecimal)) && !clazz.isInstance(value)) {
                String stringValue = String.valueOf(value);
                if (type == BigDecimal.class) {
                    value = new BigDecimal(stringValue);
                }

                if (type == BigInteger.class) {
                    value = new BigInteger(stringValue);
                }

                if (primitive != null) {
                    value = primitive.parse(stringValue);  // << error happens here
                }
            }