From dc55f493bec8feff986e5f8ddeeabc9ecc1affa6 Mon Sep 17 00:00:00 2001
From: teknium1 <teknium1@gmail.com>
Date: Fri, 6 Mar 2026 04:41:47 -0800
Subject: [PATCH] fix: add missing re.DOTALL to DeepSeek V3.1 parser (same bug
 as V3)
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

The V3.1 parser had the same issue — .*? without re.DOTALL fails to
match multi-line JSON arguments. Found during review of PR #444.
---
 environments/tool_call_parsers/deepseek_v3_1_parser.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/environments/tool_call_parsers/deepseek_v3_1_parser.py b/environments/tool_call_parsers/deepseek_v3_1_parser.py
index f0124c38..8456990c 100644
--- a/environments/tool_call_parsers/deepseek_v3_1_parser.py
+++ b/environments/tool_call_parsers/deepseek_v3_1_parser.py
@@ -35,7 +35,8 @@ class DeepSeekV31ToolCallParser(ToolCallParser):
 
     # Regex captures: function_name, function_arguments
     PATTERN = re.compile(
-        r"<｜tool▁call▁begin｜>(?P<function_name>.*?)<｜tool▁sep｜>(?P<function_arguments>.*?)<｜tool▁call▁end｜>"
+        r"<｜tool▁call▁begin｜>(?P<function_name>.*?)<｜tool▁sep｜>(?P<function_arguments>.*?)<｜tool▁call▁end｜>",
+        re.DOTALL,
     )
 
     def parse(self, text: str) -> ParseResult: