if let Some(higher::ForLoop { pat: pat, arg: arg, body: body, .. }) = higher::ForLoop::hir(expr) && let PatKind::Binding(BindingMode::NONE, _, name, None) = pat.kind && name.as_str() == "i" && let ExprKind::Struct(qpath, fields, None) = arg.kind && matches!(qpath, QPath::LangItem(LangItem::Range, _)) && fields.len() == 2 && fields[0].ident.as_str() == "start" && let ExprKind::Lit(ref lit) = fields[0].expr.kind && let LitKind::Int(0, LitIntType::Unsuffixed) = lit.node && fields[1].ident.as_str() == "end" && let ExprKind::Lit(ref lit1) = fields[1].expr.kind && let LitKind::Int(1, LitIntType::Unsuffixed) = lit1.node && let ExprKind::Block(block, None) = body.kind && block.stmts.len() == 1 && let StmtKind::Semi(e) = block.stmts[0].kind && let ExprKind::Block(block1, None) = e.kind && block1.stmts.len() == 1 && let StmtKind::Semi(e1) = block1.stmts[0].kind && let ExprKind::Call(func, args) = e1.kind && let ExprKind::Path(ref qpath1) = func.kind && match_qpath(qpath1, &["$crate", "io", "_print"]) && args.len() == 1 && let ExprKind::Call(func1, args1) = args[0].kind && let ExprKind::Path(ref qpath2) = func1.kind && match_qpath(qpath2, &["format_arguments", "new_v1"]) && args1.len() == 2 && let ExprKind::AddrOf(BorrowKind::Ref, Mutability::Not, inner) = args1[0].kind && let ExprKind::Array(elements) = inner.kind && elements.len() == 2 && let ExprKind::Lit(ref lit2) = elements[0].kind && let LitKind::Str(s, _) = lit2.node && s.as_str() == "" && let ExprKind::Lit(ref lit3) = elements[1].kind && let LitKind::Str(s1, _) = lit3.node && s1.as_str() == "\n" && let ExprKind::AddrOf(BorrowKind::Ref, Mutability::Not, inner1) = args1[1].kind && let ExprKind::Array(elements1) = inner1.kind && elements1.len() == 1 && let ExprKind::Call(func2, args2) = elements1[0].kind && let ExprKind::Path(ref qpath3) = func2.kind && match_qpath(qpath3, &["format_argument", "new_display"]) && args2.len() == 1 && let ExprKind::AddrOf(BorrowKind::Ref, Mutability::Not, inner2) = args2[0].kind && let ExprKind::Path(ref qpath4) = inner2.kind && match_qpath(qpath4, &["i"]) && block1.expr.is_none() && block.expr.is_none() { // report your lint here }