ba9c383790
Change error reporting of conflicting loans to stop earlier after printing an error for a given borrow, instead of proceeding to error on possibly every issued loan. This keeps us down to O(n) errors (for n problem lines), instead of O(n^2) errors in some cases. Fixes #27485.
29 lines
1.1 KiB
Rust
29 lines
1.1 KiB
Rust
// Copyright 2015 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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// Test to ensure we only report an error for the first issued loan that
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// conflicts with a new loan, as opposed to every issued loan. This keeps us
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// down to O(n) errors (for n problem lines), instead of O(n^2) errors.
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fn main() {
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let mut x = 1;
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let mut addr;
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loop {
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match 1 {
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1 => { addr = &mut x; }
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//~^ ERROR cannot borrow `x` as mutable more than once at a time
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2 => { addr = &mut x; }
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//~^ ERROR cannot borrow `x` as mutable more than once at a time
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_ => { addr = &mut x; }
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//~^ ERROR cannot borrow `x` as mutable more than once at a time
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}
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}
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}
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