diff options
| -rw-r--r-- | src/librustc/middle/dead.rs | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/src/librustc/middle/dead.rs b/src/librustc/middle/dead.rs index 666c1cc96f2..1818dede3e2 100644 --- a/src/librustc/middle/dead.rs +++ b/src/librustc/middle/dead.rs @@ -260,8 +260,8 @@ impl<'a, 'tcx> Visitor<'tcx> for MarkSymbolVisitor<'a, 'tcx> { fn visit_arm(&mut self, arm: &'tcx hir::Arm) { let pats = arm.top_pats_hack(); - if pats.len() == 1 { - let variants = pats[0].necessary_variants(); + if let [pat] = pats { + let variants = pat.necessary_variants(); // Inside the body, ignore constructions of variants // necessary for the pattern to match. Those construction sites |