[Bug] function call parse error, python 字符串 10220_3939392 转成了 102203939392

[phychaos]

Checklist

• I searched related issues but found no solution.
• The bug persists in the latest version.
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Describe the bug

function call 有一个严重的bug，非流式解析tool 参数，会把参数值："102020_499494994", 解析成 "102020499494994", 下划线是python 的特性，数字之间可以用_分割。tool 解析参数的代码：

def parse_arguments(
    json_value: str, arg_type: Optional[str] = None
) -> Tuple[Any, bool]:
    """Parse argument value with multiple fallback strategies.

    Args:
        json_value: Raw string value to parse
        arg_type: Expected type hint ('string', 'number', 'object', etc.)

    Returns:
        Tuple of (parsed_value, is_valid_json)
    """
    # Strategy 1: Direct JSON parsing
    try:
        parsed_value = json.loads(json_value)

        # Type coercion for number type
        if arg_type == "number" and isinstance(parsed_value, str):
            parsed_value = _convert_to_number(parsed_value)

        return parsed_value, True
    except (json.JSONDecodeError, ValueError):
        pass

    # Strategy 2: Unescape and parse
    try:
        wrapped = json.loads('{"tmp": "' + json_value + '"}')
        parsed_value = json.loads(wrapped["tmp"])

        if arg_type == "number" and isinstance(parsed_value, str):
            parsed_value = _convert_to_number(parsed_value)

        return parsed_value, True
    except (json.JSONDecodeError, ValueError, KeyError):
        pass

    # Strategy 3: ast.literal_eval
    try:
        parsed_value = ast.literal_eval(json_value)  # 会把字符串"28383_99494"， 的下划线去掉
        return parsed_value, True
    except (ValueError, SyntaxError):
        pass

    # Strategy 4: Treat as string
    try:
        quoted_value = json.dumps(str(json_value))
        return json.loads(quoted_value), True
    except (json.JSONDecodeError, ValueError):
        return json_value, False

Reproduction

glm4_moe_detector.py

Environment

Any Environment
Example:python3 -m sglang