1 type A where for<'a> for<'b> Trait1 + ?Trait2: 'a + Trait = u8; // OK
2 type A where T: Trait, = u8; // OK
3 type A where T: = u8; // OK
4 type A where T:, = u8; // OK
5 type A where T: Trait + Trait = u8; // OK
6 type A where = u8; // OK
7 type A where T: Trait + = u8; // OK
9 //~^ ERROR expected one of `!`, `(`, `+`, `::`, `:`, `<`, `==`, or `=`, found `,`