From 6d0b6c0d2cb6eefc8e7b247c3f15b53bd9b0d2ae Mon Sep 17 00:00:00 2001
From: Michael Goulet <michael@errs.io>
Date: Fri, 5 May 2023 04:57:50 +0000
Subject: Tweaks and a test

---
 .../traits/non_lifetime_binders/universe-error1.rs | 18 +++++++++++++++
 .../non_lifetime_binders/universe-error1.stderr    | 27 ++++++++++++++++++++++
 2 files changed, 45 insertions(+)
 create mode 100644 tests/ui/traits/non_lifetime_binders/universe-error1.rs
 create mode 100644 tests/ui/traits/non_lifetime_binders/universe-error1.stderr

(limited to 'tests')

diff --git a/tests/ui/traits/non_lifetime_binders/universe-error1.rs b/tests/ui/traits/non_lifetime_binders/universe-error1.rs
new file mode 100644
index 00000000000..eadee6b711e
--- /dev/null
+++ b/tests/ui/traits/non_lifetime_binders/universe-error1.rs
@@ -0,0 +1,18 @@
+#![feature(non_lifetime_binders)]
+//~^ WARN the feature `non_lifetime_binders` is incomplete
+
+trait Other<U: ?Sized> {}
+
+impl<U: ?Sized> Other<U> for U {}
+
+#[rustfmt::skip]
+fn foo<U: ?Sized>()
+where
+    for<T> T: Other<U> {}
+
+fn bar() {
+    foo::<_>();
+    //~^ ERROR the trait bound `T: Other<_>` is not satisfied
+}
+
+fn main() {}
diff --git a/tests/ui/traits/non_lifetime_binders/universe-error1.stderr b/tests/ui/traits/non_lifetime_binders/universe-error1.stderr
new file mode 100644
index 00000000000..bfcad72e352
--- /dev/null
+++ b/tests/ui/traits/non_lifetime_binders/universe-error1.stderr
@@ -0,0 +1,27 @@
+warning: the feature `non_lifetime_binders` is incomplete and may not be safe to use and/or cause compiler crashes
+  --> $DIR/universe-error1.rs:1:12
+   |
+LL | #![feature(non_lifetime_binders)]
+   |            ^^^^^^^^^^^^^^^^^^^^
+   |
+   = note: see issue #108185 <https://github.com/rust-lang/rust/issues/108185> for more information
+   = note: `#[warn(incomplete_features)]` on by default
+
+error[E0277]: the trait bound `T: Other<_>` is not satisfied
+  --> $DIR/universe-error1.rs:14:11
+   |
+LL |     foo::<_>();
+   |           ^ the trait `Other<_>` is not implemented for `T`
+   |
+note: required by a bound in `foo`
+  --> $DIR/universe-error1.rs:11:15
+   |
+LL | fn foo<U: ?Sized>()
+   |    --- required by a bound in this function
+LL | where
+LL |     for<T> T: Other<U> {}
+   |               ^^^^^^^^ required by this bound in `foo`
+
+error: aborting due to previous error; 1 warning emitted
+
+For more information about this error, try `rustc --explain E0277`.
-- 
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