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// Testing guarantees provided by once functions.
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// This program would segfault if it were legal.
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use std::sync::Arc;
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fn foo<F:FnOnce()>(blk: F) {
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blk();
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blk(); //~ ERROR use of moved value
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}
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fn main() {
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let x = Arc::new(true);
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foo(move|| {
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assert!(*x);
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drop(x);
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});
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}
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