1 error: expected one of `>`, identifier, or lifetime, found `,`
2 --> $DIR/issue-20616-8.rs:43:16
4 LL | type Type_8<'a,,> = &'a (); //~ error: expected one of `>`, identifier, or lifetime, found `,`
5 | ^ expected one of `>`, identifier, or lifetime here
7 error: aborting due to previous error