add 3/4 ices

rust-lang/rust#101660
rust-lang/rust#101665
rust-lang/rust#101667

ices/101660-1.rs

@@ -0,0 +1,11 @@
+#![feature(anonymous_lifetime_in_impl_trait)]
+
+trait Foo<T> {
+    fn bar(self, baz: T);
+}
+
+fn qux(foo: impl Foo<&str>) {
+    |baz: &str| foo.bar(baz);
+}
+
+pub fn main() {}

ices/101660-2.rs

@@ -0,0 +1,11 @@
+#![feature(anonymous_lifetime_in_impl_trait)]
+
+trait Foo<T> {
+    fn bar(self, baz: T);
+}
+
+fn qux(foo: impl Foo<&str>, baz: &str) {
+    foo.bar(baz);
+}
+
+pub fn main() {}

ices/101665.rs

@@ -0,0 +1,10 @@
+#![feature(return_position_impl_trait_in_trait)]
+#![allow(incomplete_features)]
+
+use core::fmt::Debug;
+
+trait Foo {
+    async fn baz()-> impl Debug{}
+}
+
+fn main(){}

ices/101667.rs

@@ -0,0 +1,18 @@
+#![feature(return_position_impl_trait_in_trait)]
+#![allow(incomplete_features)]
+
+use core::fmt::Debug;
+
+trait Foo {
+    fn baz(&self) -> impl Debug;
+}
+
+impl Foo for u32{
+    fn baz(&self) -> u32{
+        32
+    }
+}
+
+fn main() {
+    let i = Box::new(42_u32) as Box<dyn Foo>;
+}