syntax_data: {"ast_node_type":"variable","tokens":[{"end":63,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:         let local_decls_len = body.local_decls.push(temp_decl);
context_before:         let temp_decl = LocalDecl::new(self.discr_ty, body.span);
context_after:         let temp = Place::from(local_decls_len);