1 files changed, 23 insertions, 0 deletions
diff --git a/src/test/ui/inference/cannot-infer-partial-try-return.rs b/src/test/ui/inference/cannot-infer-partial-try-return.rs
new file mode 100644
index 000000000..b555697dc
--- /dev/null
+++ b/src/test/ui/inference/cannot-infer-partial-try-return.rs
@@ -0,0 +1,23 @@
+struct QualifiedError<E>(E);
+
+impl<E, T> From<E> for QualifiedError<T>
+where
+    E: std::error::Error,
+    T: From<E>,
+{
+    fn from(e: E) -> QualifiedError<T> {
+        QualifiedError(e.into())
+    }
+}
+
+fn infallible() -> Result<(), std::convert::Infallible> {
+    Ok(())
+}
+
+fn main() {
+    let x = || -> Result<_, QualifiedError<_>> {
+        infallible()?;
+        Ok(())
+        //~^ ERROR type annotations needed
+    };
+}