From 9a5db87ecc192814eeaa4a04baed5ca9a01ace34 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Maja=20K=C4=85dzio=C5=82ka?= <maya@compilercrim.es>
Date: Tue, 20 Jan 2026 00:19:07 +0100
Subject: [PATCH] Forward compatibility fix for rustc PR 150681

---
 lrlex/src/lib/ctbuilder.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lrlex/src/lib/ctbuilder.rs b/lrlex/src/lib/ctbuilder.rs
index 63c74066e..81df12c64 100644
--- a/lrlex/src/lib/ctbuilder.rs
+++ b/lrlex/src/lib/ctbuilder.rs
@@ -47,6 +47,7 @@ static GENERATED_PATHS: LazyLock<Mutex<HashSet<PathBuf>>> =
     LazyLock::new(|| Mutex::new(HashSet::new()));
 
 #[non_exhaustive]
+#[derive(Clone, Copy)]
 pub enum LexerKind {
     LRNonStreamingLexer,
 }