syntax_data: {"ast_node_type":"other","tokens":[{"end":123,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:             // Since `#[rustc_nounwind]` can change unwinding, we cannot infer unwinding by `fn_def_id` for a virtual call.
context_before:             tcx,
context_after:             determined_fn_def_id,