+error: item has unused generic parameters
+ --> $DIR/predicates.rs:58:4
+ |
+LL | fn quux<A, B, C: Default>() -> usize
+ | ^^^^ - - generic parameter `B` is unused
+ | |
+ | generic parameter `A` is unused
+
+error: item has unused generic parameters
+ --> $DIR/predicates.rs:75:4
+ |
+LL | fn foobar<F, G>() -> usize
+ | ^^^^^^ - generic parameter `F` is unused
+