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error[E0381]: used binding `x` is possibly-uninitialized
--> $DIR/borrowck-while.rs:4:12
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LL | let mut x: isize;
| ----- binding declared here but left uninitialized
LL | while 1 == 1 { x = 10; }
| ------ if this condition isn't met and the `while` loop runs 0 times, `x` is not initialized
LL | return x;
| ^ `x` used here but it is possibly-uninitialized
error: aborting due to 1 previous error
For more information about this error, try `rustc --explain E0381`.
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