1 files changed, 32 insertions, 0 deletions
diff --git a/tests/ui/inference/issue-72616.rs b/tests/ui/inference/issue-72616.rs
new file mode 100644
index 00000000000..69ade1a7515
--- /dev/null
+++ b/tests/ui/inference/issue-72616.rs
@@ -0,0 +1,32 @@
+// ignore-wasm32 FIXME: ignoring wasm as it suggests slightly different impls
+
+// Regression test for #72616, it used to emit incorrect diagnostics, like:
+// error[E0283]: type annotations needed for `String`
+//  --> src/main.rs:8:30
+//   |
+// 5 |         let _: String = "".to_owned().try_into().unwrap();
+//   |             - consider giving this pattern a type
+// ...
+// 8 |         if String::from("a") == "a".try_into().unwrap() {}
+//   |                              ^^ cannot infer type for struct `String`
+//   |
+//   = note: cannot satisfy `String: PartialEq<_>`
+
+use std::convert::TryInto;
+
+pub fn main() {
+    {
+        let _: String = "".to_owned().try_into().unwrap();
+    }
+    {
+        if String::from("a") == "a".try_into().unwrap() {}
+        //~^ ERROR type annotations needed
+        //~| ERROR type annotations needed
+    }
+    {
+        let _: String = match "_".try_into() {
+            Ok(a) => a,
+            Err(_) => "".into(),
+        };
+    }
+}