make NOP dyn casts not require anything about the vtable As suggested [on Zulip](https://rust-lang.zulipchat.com/#narrow/stream/144729-t-types/topic/dyn-upcasting.20stabilization/near/292151439). This matches what the codegen backends already do, and what Miri did do until https://github.com/rust-lang/rust/pull/99420 when I made it super extra paranoid. |
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| .. | ||
| back | ||
| coverageinfo | ||
| debuginfo | ||
| mir | ||
| traits | ||
| base.rs | ||
| common.rs | ||
| glue.rs | ||
| lib.rs | ||
| meth.rs | ||
| mono_item.rs | ||
| target_features.rs | ||