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error[E0381]: used binding `last_error` isn't initialized
--> $DIR/issue-103250.rs:22:13
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LL | let mut last_error: Box<dyn std::error::Error>;
| -------------- binding declared here but left uninitialized
...
LL | Err(last_error)
| ^^^^^^^^^^ `last_error` used here but it isn't initialized
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help: consider assigning a value
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LL | let mut last_error: Box<dyn std::error::Error> = todo!();
| +++++++++
error: aborting due to 1 previous error
For more information about this error, try `rustc --explain E0381`.
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