syntax_data: {"ast_node_type":"other","tokens":[{"end":87,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:             // make a failing UB check turn into much worse UB when we start unwinding.
context_before:             // We never want to insert an unwind into unsafe code, because unwinding could
context_after:             unwind: UnwindAction::Unreachable,