1 error: `C` is object-safe and has multiple supertraits
2 --> $DIR/multiple_supertrait_upcastable.rs:7:1
7 note: the lint level is defined here
8 --> $DIR/multiple_supertrait_upcastable.rs:2:9
10 LL | #![deny(multiple_supertrait_upcastable)]
11 | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
13 error: aborting due to previous error