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+warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes
+ --> $DIR/issue-38091-2.rs:4:12
+ |
+LL | #![feature(specialization)]
+ | ^^^^^^^^^^^^^^
+ |
+ = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
+ = help: consider using `min_specialization` instead, which is more stable and complete
+ = note: `#[warn(incomplete_features)]` on by default
+
+error[E0275]: overflow evaluating the requirement `i32: Check`
+ |
+note: required for `i32` to implement `Iterate<'_>`
+ --> $DIR/issue-38091-2.rs:11:13
+ |
+LL | impl<'a, T> Iterate<'a> for T
+ | ^^^^^^^^^^^ ^
+LL | where
+LL | T: Check,
+ | ----- unsatisfied trait bound introduced here
+
+error: aborting due to previous error; 1 warning emitted
+
+For more information about this error, try `rustc --explain E0275`.