syntax_data: {"ast_node_type":"other","tokens":[{"end":82,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:                 // the `UnwindResume` -> `UnwindTerminate` terminator replacement.
context_before:                 // cleanup will still happen, and terminate will happen afterwards handled by
context_after:                 let cleanup = block.terminator_mut().unwind_mut().unwrap();