From 01a889649ec1a8e47bc33746af4062d1daa77e38 Mon Sep 17 00:00:00 2001
From: chosch801 <189966085+chosch801@users.noreply.github.com>
Date: Sun, 9 Aug 2026 21:51:28 +0800
Subject: [PATCH] fix: safely parse Arabic HellaSwag endings

---
 .../tasks/multilingual/tasks/arabic.py        |  3 +-
 tests/unit/tasks/test_arabic.py               | 50 +++++++++++++++++++
 2 files changed, 52 insertions(+), 1 deletion(-)
 create mode 100644 tests/unit/tasks/test_arabic.py

diff --git a/src/lighteval/tasks/multilingual/tasks/arabic.py b/src/lighteval/tasks/multilingual/tasks/arabic.py
index 2d78f9887..226e8bac5 100644
--- a/src/lighteval/tasks/multilingual/tasks/arabic.py
+++ b/src/lighteval/tasks/multilingual/tasks/arabic.py
@@ -17,6 +17,7 @@
 paper:
 """
 
+import ast
 import random
 import re
 from string import ascii_uppercase
@@ -600,7 +601,7 @@ def copa_arabic_pfn(line, task_name: str = None):
 def hellaswag_arabic_pfn(line, task_name: str = None):
     ctx = re.sub(r"\[.*?\]", "", line["ctx"])  # Remove latin words within brackets
     endings = [
-        re.sub(r"\[.*?\]", "", e) for e in eval(line["endings"])
+        re.sub(r"\[.*?\]", "", e) for e in ast.literal_eval(line["endings"])
     ]  # endings is a string representation of a list
     answer_index = line["label"]
     instruction = "بناء على السياق التالي، اختر النهاية الصحيحة من الاقتراحات التالية"
diff --git a/tests/unit/tasks/test_arabic.py b/tests/unit/tasks/test_arabic.py
new file mode 100644
index 000000000..cbaebac13
--- /dev/null
+++ b/tests/unit/tasks/test_arabic.py
@@ -0,0 +1,50 @@
+# MIT License
+#
+# Copyright (c) 2024 The HuggingFace Team
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+import pytest
+
+from lighteval.tasks.multilingual.tasks.arabic import hellaswag_arabic_pfn
+
+
+def test_hellaswag_arabic_pfn_parses_literal_endings():
+    line = {
+        "ctx": "سياق",
+        "endings": "['نهاية أولى', 'نهاية ثانية']",
+        "label": 1,
+    }
+
+    doc = hellaswag_arabic_pfn(line, task_name="test_task")
+
+    assert doc.task_name == "test_task"
+    assert doc.choices == ["نهاية أولى", "نهاية ثانية"]
+    assert doc.gold_index == 1
+
+
+def test_hellaswag_arabic_pfn_rejects_non_literal_endings():
+    line = {
+        "ctx": "سياق",
+        "endings": "['safe'] + ['still an expression']",
+        "label": 0,
+    }
+
+    with pytest.raises(ValueError):
+        hellaswag_arabic_pfn(line)