File: issue-52240.stderr

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rustc 1.89.0%2Bdfsg1-1
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error[E0596]: cannot borrow data in a `&` reference as mutable
  --> $DIR/issue-52240.rs:9:27
   |
LL |     if let (Some(Foo::Bar(ref mut val)), _) = (&arr.get(0), 0) {
   |                           ^^^^^^^^^^^ cannot borrow as mutable

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0596`.