Add test for #80607 with undesired output

src/test/ui/issues/issue-80607.rs

@@ -0,0 +1,10 @@
+// This tests makes sure the diagnostics print the offending enum variant, not just the type.
+pub enum Enum {
+    V1(i32),
+}
+
+pub fn foo(x: i32) -> Enum {
+    Enum::V1 { x } //~ ERROR field does not exist
+}
+
+fn main() {}

src/test/ui/issues/issue-80607.stderr

@@ -0,0 +1,14 @@
+error[E0559]: variant `Enum::V1` has no field named `x`
+  --> $DIR/issue-80607.rs:7:16
+   |
+LL |     V1(i32),
+   |     -- `Enum` defined here
+...
+LL |     Enum::V1 { x }
+   |     --------   ^ field does not exist
+   |     |
+   |     `Enum` is a tuple variant, use the appropriate syntax: `Enum(/* fields */)`
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0559`.