rust/src/test/run-pass/issues/issue-33903.rs

// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.

// run-pass
// Issue 33903:
// Built-in indexing should be used even when the index is not
// trivially an integer
// Only built-in indexing can be used in constant expressions

const FOO: i32 = [12, 34][0 + 1];

fn main() {}