From 7e406e276a1778390c06ce40a9a4929e3d371776 Mon Sep 17 00:00:00 2001
From: yanglsh <yanglsh@shanghaitech.edu.cn>
Date: Tue, 24 Jun 2025 21:18:22 +0800
Subject: [PATCH] fix: `disallowed_script_idents` FP on identifiers with `_`

---
 clippy_lints/src/disallowed_script_idents.rs |  4 ++++
 tests/ui/disallowed_script_idents.rs         | 14 ++++++++++++++
 2 files changed, 18 insertions(+)

diff --git a/clippy_lints/src/disallowed_script_idents.rs b/clippy_lints/src/disallowed_script_idents.rs
index d1a8590c59b4..cf964d4b5804 100644
--- a/clippy_lints/src/disallowed_script_idents.rs
+++ b/clippy_lints/src/disallowed_script_idents.rs
@@ -89,6 +89,10 @@ impl EarlyLintPass for DisallowedScriptIdents {
             // Fast path for ascii-only idents.
             if !symbol_str.is_ascii()
                 && let Some(script) = symbol_str.chars().find_map(|c| {
+                    if c.is_ascii() {
+                        return None;
+                    }
+
                     c.script_extension()
                         .iter()
                         .find(|script| !self.whitelist.contains(script))
diff --git a/tests/ui/disallowed_script_idents.rs b/tests/ui/disallowed_script_idents.rs
index 08fd1d9669ee..dae380045ae4 100644
--- a/tests/ui/disallowed_script_idents.rs
+++ b/tests/ui/disallowed_script_idents.rs
@@ -15,3 +15,17 @@ fn main() {
     let カウンタ = 10;
     //~^ disallowed_script_idents
 }
+
+fn issue15116() {
+    const ÄÖÜ: u8 = 0;
+    const _ÄÖÜ: u8 = 0;
+    const Ä_ÖÜ: u8 = 0;
+    const ÄÖ_Ü: u8 = 0;
+    const ÄÖÜ_: u8 = 0;
+    let äöüß = 1;
+    let _äöüß = 1;
+    let ä_öüß = 1;
+    let äö_üß = 1;
+    let äöü_ß = 1;
+    let äöüß_ = 1;
+}