1 files changed, 30 insertions, 0 deletions
diff --git a/tests/ui/did_you_mean/issue-42764.rs b/tests/ui/did_you_mean/issue-42764.rs
new file mode 100644
index 000000000..eb96c2480
--- /dev/null
+++ b/tests/ui/did_you_mean/issue-42764.rs
@@ -0,0 +1,30 @@
+enum DoubleOption<T> {
+    FirstSome(T),
+    AlternativeSome(T),
+    Nothing,
+}
+
+fn this_function_expects_a_double_option<T>(d: DoubleOption<T>) {}
+
+fn main() {
+    let n: usize = 42;
+    this_function_expects_a_double_option(n);
+    //~^ ERROR mismatched types
+    //~| HELP try wrapping the expression in a variant of `DoubleOption`
+}
+
+
+// But don't issue the "try using a variant" help if the one-"variant" ADT is
+// actually a one-field struct.
+
+struct Payload;
+
+struct Wrapper { payload: Payload }
+
+struct Context { wrapper: Wrapper }
+
+fn overton() {
+    let _c = Context { wrapper: Payload{} };
+    //~^ ERROR mismatched types
+    //~| try wrapping the expression in `Wrapper`
+}