syntax_data: {"ast_node_type":"other","tokens":[{"end":65,"kind":"keyword","start":0,"text":"debug!(\"add_fake_borrows"}]}
source_snippet:     debug!("add_fake_borrows fake_borrows = {:?}", fake_borrows);
context_before:     let fake_borrows = collector.fake_borrows;
context_after:     let tcx = cx.tcx;