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+error[E0277]: the trait bound `Error: Eq` is not satisfied
+ --> $DIR/derives-span-Eq-tuple-struct.rs:8:5
+ |
+LL | #[derive(Eq,PartialEq)]
+ | -- in this derive macro expansion
+LL | struct Struct(
+LL | Error
+ | ^^^^^ the trait `Eq` is not implemented for `Error`
+ |
+note: required by a bound in `AssertParamIsEq`
+ --> $SRC_DIR/core/src/cmp.rs:LL:COL
+ = note: this error originates in the derive macro `Eq` (in Nightly builds, run with -Z macro-backtrace for more info)
+help: consider annotating `Error` with `#[derive(Eq)]`
+ |
+LL | #[derive(Eq)]
+ |
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0277`.