syntax_data: {"ast_node_type":"other","tokens":[{"end":93,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:             // Any terminators that *can* unwind but don't have an unwind target set are also
context_before:         } else if !block.is_cleanup
context_after:             // pointed at our poisoning block (unless they're part of the cleanup path).