syntax_data: {"ast_node_type":"other","tokens":[{"end":84,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:                 // registered for it (and turn it into `UnwindAction::Unreachable`).
context_before:                 // to have a landing pad. This means that we can remove any cleanup
context_after:                 let cleanup = block.terminator_mut().unwind_mut().unwrap();