From 218caa410aa38c29984be31a5229b9fa717560ee Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Wed, 17 Apr 2024 14:19:13 +0200
Subject: Merging upstream version 1.68.2+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 tests/ui/on-unimplemented/on-trait.rs | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)
 create mode 100644 tests/ui/on-unimplemented/on-trait.rs

(limited to 'tests/ui/on-unimplemented/on-trait.rs')

diff --git a/tests/ui/on-unimplemented/on-trait.rs b/tests/ui/on-unimplemented/on-trait.rs
new file mode 100644
index 000000000..556813cd4
--- /dev/null
+++ b/tests/ui/on-unimplemented/on-trait.rs
@@ -0,0 +1,32 @@
+// ignore-tidy-linelength
+
+#![feature(rustc_attrs)]
+
+pub mod Bar {
+  #[rustc_on_unimplemented = "test error `{Self}` with `{Bar}` `{Baz}` `{Quux}` in `{Foo}`"]
+  pub trait Foo<Bar, Baz, Quux> {}
+}
+
+use Bar::Foo;
+
+fn foobar<U: Clone, T: Foo<u8, U, u32>>() -> T {
+    panic!()
+}
+
+#[rustc_on_unimplemented="a collection of type `{Self}` cannot be built from an iterator over elements of type `{A}`"]
+trait MyFromIterator<A> {
+    /// Builds a container with elements from an external iterator.
+    fn my_from_iter<T: Iterator<Item=A>>(iterator: T) -> Self;
+}
+
+fn collect<A, I: Iterator<Item=A>, B: MyFromIterator<A>>(it: I) -> B {
+    MyFromIterator::my_from_iter(it)
+}
+
+pub fn main() {
+    let x = vec![1u8, 2, 3, 4];
+    let y: Option<Vec<u8>> = collect(x.iter()); // this should give approximately the same error for x.iter().collect()
+    //~^ ERROR
+
+    let x: String = foobar(); //~ ERROR
+}
-- 
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