error[E0283]: type annotations required: cannot resolve `&'a T: Foo`
--> $DIR/issue-21974.rs:10:1
|
-LL | / fn foo<'a,'b,T>(x: &'a T, y: &'b T) //~ ERROR type annotations required
+LL | / fn foo<'a,'b,T>(x: &'a T, y: &'b T)
LL | | where &'a T : Foo,
LL | | &'b T : Foo
LL | | {