error: mismatched closing delimiter: `)` --> $DIR/issue-68987-unmatch-issue-2.rs:3:32 | LL | async fn obstest() -> Result<> { | ^ unclosed delimiter LL | let obs_connect = || -> Result<(), MyError) { | ^ mismatched closing delimiter error: unexpected closing delimiter: `}` --> $DIR/issue-68987-unmatch-issue-2.rs:14:1 | LL | let obs_connect = || -> Result<(), MyError) { | - missing open `(` for this delimiter ... LL | } | ^ unexpected closing delimiter error: aborting due to 2 previous errors