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diff --git a/tests/ui/iterators/vec-on-unimplemented.stderr b/tests/ui/iterators/vec-on-unimplemented.stderr
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+error[E0599]: `Vec<bool>` is not an iterator
+ --> $DIR/vec-on-unimplemented.rs:2:23
+ |
+LL | vec![true, false].map(|v| !v).collect::<Vec<_>>();
+ | ^^^ `Vec<bool>` is not an iterator; try calling `.into_iter()` or `.iter()`
+ --> $SRC_DIR/alloc/src/vec/mod.rs:LL:COL
+ |
+ = note: doesn't satisfy `Vec<bool>: Iterator`
+ |
+ = note: the following trait bounds were not satisfied:
+ `Vec<bool>: Iterator`
+ which is required by `&mut Vec<bool>: Iterator`
+ `[bool]: Iterator`
+ which is required by `&mut [bool]: Iterator`
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0599`.