the minimal test for two-phase borrows: the core example from niko's blog post on it.
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src/test/run-pass/borrowck/two-phase-baseline.rs
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src/test/run-pass/borrowck/two-phase-baseline.rs
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// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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// revisions: lxl nll
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//[lxl]compile-flags: -Z borrowck=mir -Z two-phase-borrows
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//[nll]compile-flags: -Z borrowck=mir -Z two-phase-borrows -Z nll
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// This is the "goto example" for why we want two phase borrows.
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fn main() {
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let mut v = vec![0, 1, 2];
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v.push(v.len());
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assert_eq!(v, [0, 1, 2, 3]);
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}
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