Import async-trait crate.
Bug: 164106399
Bug: 158290206
Test: mm
Change-Id: I0c4a491b785134e4ac1d5572e5ff94b8699dc0bc
diff --git a/tests/ui/self-span.stderr b/tests/ui/self-span.stderr
new file mode 100644
index 0000000..f897c01
--- /dev/null
+++ b/tests/ui/self-span.stderr
@@ -0,0 +1,30 @@
+error[E0423]: expected value, found struct `S`
+ --> $DIR/self-span.rs:18:23
+ |
+3 | pub struct S {}
+ | --------------- `S` defined here
+...
+18 | let _: Self = Self;
+ | ^^^^ did you mean `S { /* fields */ }`?
+
+error[E0308]: mismatched types
+ --> $DIR/self-span.rs:17:21
+ |
+17 | let _: () = self;
+ | -- ^^^^ expected `()`, found struct `S`
+ | |
+ | expected due to this
+
+error[E0308]: mismatched types
+ --> $DIR/self-span.rs:25:21
+ |
+25 | let _: () = self;
+ | -- ^^^^ expected `()`, found enum `E`
+ | |
+ | expected due to this
+
+error[E0533]: expected unit struct, unit variant or constant, found struct variant `Self::V`
+ --> $DIR/self-span.rs:26:23
+ |
+26 | let _: Self = Self::V;
+ | ^^^^^^^
