1 files changed, 22 insertions, 0 deletions
diff --git a/tests/ui/impl-trait/apit/arg-position-impl-trait-too-long.rs b/tests/ui/impl-trait/apit/arg-position-impl-trait-too-long.rs
new file mode 100644
index 00000000000..8ef9281c9d3
--- /dev/null
+++ b/tests/ui/impl-trait/apit/arg-position-impl-trait-too-long.rs
@@ -0,0 +1,22 @@
+struct Header;
+struct EntryMetadata;
+struct Entry<A, B>(A, B);
+
+trait Tr {
+    type EncodedKey;
+    type EncodedValue;
+}
+
+fn test<C: Tr, R>(
+    // This APIT is long, however we shouldn't render the type name with a newline in it.
+    y: impl FnOnce(
+        &mut Header,
+        &mut [EntryMetadata],
+        &mut [Entry<C::EncodedKey, C::EncodedValue>]
+    ) -> R,
+) {
+    let () = y;
+    //~^ ERROR mismatched types
+}
+
+fn main() {}