syntax_data: {"ast_node_type":"other","tokens":[{"end":97,"kind":"keyword","start":0,"text":"bug!(\"`initialize_start_block`"}]}
source_snippet:             bug!("`initialize_start_block` is not yet supported for backward dataflow analyses");
context_before:         if Self::Direction::IS_BACKWARD && results[mir::START_BLOCK] != self.bottom_value(body) {
context_after:         }