1 files changed, 19 insertions, 0 deletions
diff --git a/tests/ui/inference/need_type_info/channel.rs b/tests/ui/inference/need_type_info/channel.rs
new file mode 100644
index 000000000..e2ba5a941
--- /dev/null
+++ b/tests/ui/inference/need_type_info/channel.rs
@@ -0,0 +1,19 @@
+// Test that we suggest specifying the generic argument of `channel`
+// instead of the return type of that function, which is a lot more
+// complex.
+use std::sync::mpsc::channel;
+
+fn no_tuple() {
+    let _data =
+        channel(); //~ ERROR type annotations needed
+}
+
+fn tuple() {
+    let (_sender, _receiver) =
+        channel(); //~ ERROR type annotations needed
+}
+
+fn main() {
+    no_tuple();
+    tuple();
+}