File: issue-98260.stderr

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rustc 1.87.0%2Bdfsg1-1
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error[E0121]: the placeholder `_` is not allowed within types on item signatures for return types
  --> $DIR/issue-98260.rs:3:27
   |
LL |     fn a(aa: B) -> Result<_, B> {
   |                    -------^----
   |                    |      |
   |                    |      not allowed in type signatures
   |                    help: replace with the correct return type: `Result<(), B>`

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0121`.