"#,
)
}
+
+#[test]
+fn issue_8686() {
+ check_infer(
+ r#"
+pub trait Try: FromResidual {
+ type Output;
+ type Residual;
+}
+pub trait FromResidual<R = <Self as Try>::Residual> {
+ fn from_residual(residual: R) -> Self;
+}
+
+struct ControlFlow<B, C>;
+impl<B, C> Try for ControlFlow<B, C> {
+ type Output = C;
+ type Residual = ControlFlow<B, !>;
+}
+impl<B, C> FromResidual for ControlFlow<B, C> {
+ fn from_residual(r: ControlFlow<B, !>) -> Self { ControlFlow }
+}
+
+fn test() {
+ ControlFlow::from_residual(ControlFlow::<u32, !>);
+}
+ "#,
+ expect![[r#"
+ "#]],
+ );
+}