Revert recent change to avoid using Arc:ptr_eq #29
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Due to a clippy warning about Arc::ptr_eq potentially comparing vtable meta data associated with wide pointers there was a recent change to explicitly only check the address pointers and discard any wide pointer meta data.
The Rust libs team has since resolved to update Arc::ptr_eq so that it doesn't compare meta data for the wrapped value (such as a dyn trait vtable):
rust-lang/rust#103763
In the meantime we can silence this clippy suggestion since the vtable is benign in this case anyway:
rust-lang/rust-clippy#6524
Fixes: #26