From 1963d4c1277a95daa38e251f7aba3ebb1f87971c Mon Sep 17 00:00:00 2001
From: shihaobai <1798930569@qq.com>
Date: Mon, 15 Jun 2026 14:40:31 +0000
Subject: [PATCH] Return 400 for chat template build errors

---
 lightllm/server/build_prompt.py | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/lightllm/server/build_prompt.py b/lightllm/server/build_prompt.py
index 96b4d040b..54d22a0d0 100644
--- a/lightllm/server/build_prompt.py
+++ b/lightllm/server/build_prompt.py
@@ -159,7 +159,6 @@ async def build_prompt(request, tools) -> str:
 
     try:
         input_str = tokenizer.apply_chat_template(**kwargs, tokenize=False, add_generation_prompt=True, tools=tools)
-    except BaseException as e:
-        logger.error(f"Failed to build prompt: {e}")
-        raise e
+    except Exception as e:
+        raise ValueError(f"Failed to build prompt: {e}") from None
     return input_str