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diff --git a/tests/ui/suggestions/bad-infer-in-trait-impl.stderr b/tests/ui/suggestions/bad-infer-in-trait-impl.stderr
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+error[E0121]: the placeholder `_` is not allowed within types on item signatures for functions
+ --> $DIR/bad-infer-in-trait-impl.rs:6:15
+ |
+LL | fn bar(s: _) {}
+ | ^ not allowed in type signatures
+ |
+help: use type parameters instead
+ |
+LL | fn bar<T>(s: T) {}
+ | +++ ~
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0121`.