syntax_data: {"ast_node_type":"other","tokens":[{"end":92,"kind":"keyword","start":0,"text":"self.cfg.push_fake_read(block,"}]}
source_snippet:                 self.cfg.push_fake_read(block, source_info, FakeReadCause::ForIndex, place);
context_before:                 // Could partial array tracking work off something else instead?
context_after:                 let const_ = Const::Ty(self.tcx.types.usize, *len_const);