src/test/ui/issue-23041.stderr


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error[E0282]: type annotations needed
  --> $DIR/issue-23041.rs:16:22
   |
LL |     b.downcast_ref::<fn(_)->_>(); //~ ERROR E0282
   |                      ^^^^^^^^ cannot infer type for `_`

error: aborting due to previous error

For more information about this error, try `rustc --explain E0282`.