From 6df6eb8ae8358ebab76fcfa35ac7cc41e18a2560 Mon Sep 17 00:00:00 2001
From: jackh726 <jack.huey@umassmed.edu>
Date: Mon, 16 Aug 2021 10:49:36 -0400
Subject: [PATCH] Add a couple more tests

---
 .../issue-87429-associated-type-default.rs    | 18 +++++++++++++
 ...issue-87429-associated-type-default.stderr | 14 +++++++++++
 .../issue-87429-specialization.rs             | 25 +++++++++++++++++++
 .../issue-87429-specialization.stderr         | 24 ++++++++++++++++++
 4 files changed, 81 insertions(+)
 create mode 100644 src/test/ui/generic-associated-types/issue-87429-associated-type-default.rs
 create mode 100644 src/test/ui/generic-associated-types/issue-87429-associated-type-default.stderr
 create mode 100644 src/test/ui/generic-associated-types/issue-87429-specialization.rs
 create mode 100644 src/test/ui/generic-associated-types/issue-87429-specialization.stderr

diff --git a/src/test/ui/generic-associated-types/issue-87429-associated-type-default.rs b/src/test/ui/generic-associated-types/issue-87429-associated-type-default.rs
new file mode 100644
index 00000000000..9ee07c2f1e1
--- /dev/null
+++ b/src/test/ui/generic-associated-types/issue-87429-associated-type-default.rs
@@ -0,0 +1,18 @@
+// check-fail
+
+#![feature(associated_type_defaults)]
+#![feature(generic_associated_types)]
+
+trait Family {
+    // Fine, i32: PartialEq<i32>
+    type Member<'a>: for<'b> PartialEq<Self::Member<'b>> = i32;
+}
+
+struct Foo;
+trait Family2 {
+    // Not fine, not Foo: PartialEq<Foo>
+    type Member<'a>: for<'b> PartialEq<Self::Member<'b>> = Foo;
+    //~^ ERROR can't compare
+}
+
+fn main() {}
diff --git a/src/test/ui/generic-associated-types/issue-87429-associated-type-default.stderr b/src/test/ui/generic-associated-types/issue-87429-associated-type-default.stderr
new file mode 100644
index 00000000000..8f031c76183
--- /dev/null
+++ b/src/test/ui/generic-associated-types/issue-87429-associated-type-default.stderr
@@ -0,0 +1,14 @@
+error[E0277]: can't compare `Foo` with `Foo`
+  --> $DIR/issue-87429-associated-type-default.rs:14:5
+   |
+LL |     type Member<'a>: for<'b> PartialEq<Self::Member<'b>> = Foo;
+   |     ^^^^^^^^^^^^^^^^^-----------------------------------^^^^^^^
+   |     |                |
+   |     |                required by this bound in `Family2::Member`
+   |     no implementation for `Foo == Foo`
+   |
+   = help: the trait `PartialEq` is not implemented for `Foo`
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0277`.
diff --git a/src/test/ui/generic-associated-types/issue-87429-specialization.rs b/src/test/ui/generic-associated-types/issue-87429-specialization.rs
new file mode 100644
index 00000000000..b365e07feb2
--- /dev/null
+++ b/src/test/ui/generic-associated-types/issue-87429-specialization.rs
@@ -0,0 +1,25 @@
+// check-fail
+
+#![feature(specialization)]
+//~^ WARN incomplete
+#![feature(generic_associated_types)]
+
+trait Family {
+    type Member<'a>: for<'b> PartialEq<Self::Member<'b>>;
+}
+
+struct I32Family;
+
+impl Family for I32Family {
+    default type Member<'a> = i32;
+}
+
+struct Foo;
+struct FooFamily;
+
+impl Family for FooFamily {
+    default type Member<'a> = Foo;
+    //~^ ERROR can't compare
+}
+
+fn main() {}
diff --git a/src/test/ui/generic-associated-types/issue-87429-specialization.stderr b/src/test/ui/generic-associated-types/issue-87429-specialization.stderr
new file mode 100644
index 00000000000..05d40f9e7cc
--- /dev/null
+++ b/src/test/ui/generic-associated-types/issue-87429-specialization.stderr
@@ -0,0 +1,24 @@
+warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes
+  --> $DIR/issue-87429-specialization.rs:3:12
+   |
+LL | #![feature(specialization)]
+   |            ^^^^^^^^^^^^^^
+   |
+   = note: `#[warn(incomplete_features)]` on by default
+   = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
+   = help: consider using `min_specialization` instead, which is more stable and complete
+
+error[E0277]: can't compare `Foo` with `Foo`
+  --> $DIR/issue-87429-specialization.rs:21:5
+   |
+LL |     type Member<'a>: for<'b> PartialEq<Self::Member<'b>>;
+   |                      ----------------------------------- required by this bound in `Family::Member`
+...
+LL |     default type Member<'a> = Foo;
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no implementation for `Foo == Foo`
+   |
+   = help: the trait `PartialEq` is not implemented for `Foo`
+
+error: aborting due to previous error; 1 warning emitted
+
+For more information about this error, try `rustc --explain E0277`.
-- 
2.44.0