From 572c405da063d2628378b74a8f659ce90e0e7779 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Matthias=20Kr=C3=BCger?= Date: Tue, 27 Apr 2021 23:16:19 +0200 Subject: [PATCH] fix ice when checking rustc libstd thread 'rustc' panicked at 'index out of bounds: the len is 0 but the index is 0', src/tools/clippy/clippy_lints/src/matches.rs:1595:53 note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace I don't have a minimised testcase because I don't have time to reduce libstd down to a few lines right now. --- clippy_lints/src/matches.rs | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/clippy_lints/src/matches.rs b/clippy_lints/src/matches.rs index 13b2a834b0a9..c7a25095bf6f 100644 --- a/clippy_lints/src/matches.rs +++ b/clippy_lints/src/matches.rs @@ -1590,9 +1590,9 @@ fn is_none_arm(cx: &LateContext<'_>, arm: &Arm<'_>) -> bool { // Checks if arm has the form `Some(ref v) => Some(v)` (checks for `ref` and `ref mut`) fn is_ref_some_arm(cx: &LateContext<'_>, arm: &Arm<'_>) -> Option { if_chain! { - if let PatKind::TupleStruct(ref qpath, pats, _) = arm.pat.kind; + if let PatKind::TupleStruct(ref qpath, [first_pat, ..], _) = arm.pat.kind; if is_lang_ctor(cx, qpath, OptionSome); - if let PatKind::Binding(rb, .., ident, _) = pats[0].kind; + if let PatKind::Binding(rb, .., ident, _) = first_pat.kind; if rb == BindingAnnotation::Ref || rb == BindingAnnotation::RefMut; if let ExprKind::Call(e, args) = remove_blocks(arm.body).kind; if let ExprKind::Path(ref some_path) = e.kind;