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warning: value assigned to `a` is never read
--> $DIR/warn-unused-duplication.rs:9:6
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LL | (a, a) = (0, 1);
| ^
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= help: maybe it is overwritten before being read?
note: the lint level is defined here
--> $DIR/warn-unused-duplication.rs:3:9
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LL | #![warn(unused_assignments)]
| ^^^^^^^^^^^^^^^^^^
warning: 1 warning emitted
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