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