syntax_data: {"ast_node_type":"other","tokens":[{"end":56,"kind":"keyword","start":0,"text":"self.block_data(block).terminator.is_none(),"}]}
source_snippet:             self.block_data(block).terminator.is_none(),
context_before:         debug_assert!(
context_after:             "terminate: block {:?}={:?} already has a terminator set",