1 error[E0623]: lifetime mismatch
2 --> $DIR/ex2d-push-inference-variable-2.rs:6:33
4 LL | fn foo<'a, 'b, 'c>(x: &'a mut Vec<Ref<'b, i32>>, y: Ref<'c, i32>) {
5 | ------------ ------------ these two types are declared with different lifetimes...
6 LL | let a: &mut Vec<Ref<i32>> = x;
7 | ^ ...but data from `y` flows into `x` here
9 error: aborting due to previous error
11 For more information about this error, try `rustc --explain E0623`.