1error: `?` may only modify trait bounds, not lifetime bounds 2 --> $DIR/issue-68890.rs:1:11 3 | 4LL | enum e{A((?'a a+?+l))} 5 | ^ 6 7error: expected one of `)`, `+`, or `,`, found `a` 8 --> $DIR/issue-68890.rs:1:15 9 | 10LL | enum e{A((?'a a+?+l))} 11 | ^ expected one of `)`, `+`, or `,` 12 13error: expected item, found `)` 14 --> $DIR/issue-68890.rs:1:21 15 | 16LL | enum e{A((?'a a+?+l))} 17 | ^ expected item 18 19error: aborting due to 3 previous errors 20 21