error: expected one of `>`, identifier, lifetime, or type, found `,` | |
--> $DIR/issue-20616-3.rs:25:24 | |
| | |
LL | type Type_3<T> = Box<T,,>; //~ error: expected one of `>`, identifier, lifetime, or type, found `,` | |
| ^ expected one of `>`, identifier, lifetime, or type here | |
error: aborting due to previous error | |