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