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Passively introduce attributes

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Ensure that std::sync::Arc is actually used, as this exercise can be compiled using things already learnt in previous exercises.
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Alexx Roche 2020-06-08 15:27:18 +02:00 committed by GitHub
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exercises/standard_library_types/arc1.rs
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@ -6,6 +6,7 @@
// I AM NOT DONE // I AM NOT DONE
#![forbid(unused_imports)] // Do not change this, (or the next) line.
use std::sync::Arc; use std::sync::Arc;
use std::thread; use std::thread;