syntax_data: {"ast_node_type":"other","tokens":[{"end":66,"kind":"keyword","start":0,"text":"basic_blocks:"}]}
source_snippet:     basic_blocks: &mut IndexVec<BasicBlock, BasicBlockData<'tcx>>,
context_before:     local_decls: &mut IndexVec<Local, LocalDecl<'tcx>>,
context_after:     current_block: BasicBlock,