syntax_data: {"ast_node_type":"other","tokens":[{"end":43,"kind":"keyword","start":0,"text":"always_live_locals:"}]}
source_snippet:     always_live_locals: DenseBitSet<Local>,
context_before:     saved_locals: &'mir CoroutineSavedLocals,
context_after:     analysis: &mut MaybeRequiresStorage<'mir, 'tcx>,