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diff --git a/src/test/ui/lazy-type-alias-impl-trait/branches.stderr b/src/test/ui/lazy-type-alias-impl-trait/branches.stderr
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+++ b/src/test/ui/lazy-type-alias-impl-trait/branches.stderr
@@ -0,0 +1,16 @@
+error[E0277]: a value of type `Bar` cannot be built from an iterator over elements of type `_`
+ --> $DIR/branches.rs:19:28
+ |
+LL | std::iter::empty().collect()
+ | ^^^^^^^ value of type `Bar` cannot be built from `std::iter::Iterator<Item=_>`
+ |
+ = help: the trait `FromIterator<_>` is not implemented for `Bar`
+note: required by a bound in `collect`
+ --> $SRC_DIR/core/src/iter/traits/iterator.rs:LL:COL
+ |
+LL | fn collect<B: FromIterator<Self::Item>>(self) -> B
+ | ^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `collect`
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0277`.