8602: Fix panic in `replace_derive_with_manual_impl` r=jonas-schievink a=jonas-schievink bors r+ Co-authored-by: Jonas Schievink <jonasschievink@gmail.com>
8602: Fix panic in `replace_derive_with_manual_impl` r=jonas-schievink a=jonas-schievink bors r+ Co-authored-by: Jonas Schievink <jonasschievink@gmail.com>