Merging upstream version 1.73.0+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 22 insertions, 0 deletions

diff --git a/tests/ui/auto-traits/issue-83857-ub.stderr b/tests/ui/auto-traits/issue-83857-ub.stderr
new file mode 100644
index 000000000..23a2f62d9
--- /dev/null
+++ b/tests/ui/auto-traits/issue-83857-ub.stderr
@@ -0,0 +1,22 @@
+error[E0277]: `Foo<T, U>` cannot be sent between threads safely
+  --> $DIR/issue-83857-ub.rs:22:38
+   |
+LL | fn generic<T, U>(v: Foo<T, U>, f: fn(<Foo<T, U> as WithAssoc>::Output) -> i32) {
+   |                                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `Foo<T, U>` cannot be sent between threads safely
+   |
+   = help: the trait `Send` is not implemented for `Foo<T, U>`
+note: required for `Foo<T, U>` to implement `WithAssoc`
+  --> $DIR/issue-83857-ub.rs:15:15
+   |
+LL | impl<T: Send> WithAssoc for T {
+   |         ----  ^^^^^^^^^     ^
+   |         |
+   |         unsatisfied trait bound introduced here
+help: consider introducing a `where` clause, but there might be an alternative better way to express this requirement
+   |
+LL | fn generic<T, U>(v: Foo<T, U>, f: fn(<Foo<T, U> as WithAssoc>::Output) -> i32) where Foo<T, U>: Send {
+   |                                                                                +++++++++++++++++++++
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0277`.