mirror of https://github.com/rust-lang/rust
15 lines
359 B
Rust
15 lines
359 B
Rust
//@ run-pass
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pub fn main() {
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// Make sure we properly handle repeated self-appends.
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let mut a: String = "A".to_string();
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let mut i = 20;
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let mut expected_len = 1;
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while i > 0 {
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println!("{}", a.len());
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assert_eq!(a.len(), expected_len);
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a = format!("{}{}", a, a);
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i -= 1;
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expected_len *= 2;
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}
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}
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