syntax_data: {"ast_node_type":"other","tokens":[{"end":96,"kind":"keyword","start":0,"text":"self.cfg.push_fake_read(block,"}]}
source_snippet:                 self.cfg.push_fake_read(block, source_info, FakeReadCause::ForLet(None), place);
context_before:                 let source_info = self.source_info(irrefutable_pat.span);