syntax_data: {"ast_node_type":"other","tokens":[{"end":99,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:     // Calculate the MIR locals that have been previously borrowed (even if they are still active).
context_after:     let borrowed_locals = MaybeBorrowedLocals.iterate_to_fixpoint(tcx, body, Some("coroutine"));