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+error[E0277]: the trait bound `&mut T: Clone` is not satisfied
+ --> $DIR/issue-79458.rs:6:5
+ |
+LL | #[derive(Clone)]
+ | ----- in this derive macro expansion
+LL | struct Foo<'a, T> {
+LL | bar: &'a mut T
+ | ^^^^^^^^^^^^^^ the trait `Clone` is not implemented for `&mut T`
+ |
+ = help: the trait `Clone` is implemented for `&T`
+ = note: `Clone` is implemented for `&T`, but not for `&mut T`
+ = note: this error originates in the derive macro `Clone` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0277`.