mirror of https://github.com/rust-lang/rust
16 lines
509 B
Rust
16 lines
509 B
Rust
// This is the first counter-example from Niko's blog post
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// smallcultfollowing.com/babysteps/blog/2017/03/01/nested-method-calls-via-two-phase-borrowing/
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// of a danger for code to crash if we just turned off the check for whether
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// a mutable-borrow aliases another borrow.
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fn main() {
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let mut v: Vec<String> = vec![format!("Hello, ")];
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v[0].push_str({
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v.push(format!("foo"));
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//~^ ERROR cannot borrow `v` as mutable more than once at a time [E0499]
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"World!"
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});
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}
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