syntax_data: {"ast_node_type":"other","tokens":[{"end":85,"kind":"keyword","start":0,"text":"bug!(\"expected"}]}
source_snippet:             bug!("expected `dyn` type in `confirm_trait_upcasting_unsize_candidate`")
context_before:         let ty::Dynamic(a_data, a_region, ty::Dyn) = *a_ty.kind() else {
context_after:         };