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1 error[E0277]: `&T` needs to be a pointer-sized type
2   --> $DIR/check-size-at-cast-polymorphic-bad.rs:11:15
3    |
4 LL |     dyn_debug(t);
5    |               ^ `&T` needs to be a pointer-sized type
6    |
7    = help: the trait `PointerSized` is not implemented for `&T`
8 help: consider introducing a `where` clause, but there might be an alternative better way to express this requirement
9    |
10 LL | fn polymorphic<T: Debug + ?Sized>(t: &T) where &T: PointerSized {
11    |                                          ++++++++++++++++++++++
12
13 error: aborting due to previous error
14
15 For more information about this error, try `rustc --explain E0277`.