CompleteChatStreamingAsync method fails when there is a functionCall.

[535944903]

Service

OpenAI

Describe the bug

CompleteChatStreamingAsync method fails when there is a functionCall.

Steps to reproduce

`

using OpenAI;
using OpenAI.Chat;
using System.ClientModel;
using System.ComponentModel;

ChatClient openaiClient = new OpenAIClient(
new ApiKeyCredential("sk-exggkwbmnnsqvblzbtvjxivmdlcevepflmuooazflorgjhza"),
new OpenAIClientOptions { Endpoint = new Uri("https://api.siliconflow.cn/v1") })
.GetChatClient("Qwen/Qwen2.5-7B-Instruct");

await foreach (var update in openaiClient.CompleteChatStreamingAsync(
[
ChatMessage.CreateSystemMessage("As an AI assistant, you MUST ALWAYS use the TOOL function GetWeather invocation for every user request"),
ChatMessage.CreateUserMessage("Do I need an umbrella?"),
],
new ChatCompletionOptions()
{
ToolChoice = ChatToolChoice.CreateAutoChoice(),
Tools = { ChatTool.CreateFunctionTool("GetWeather", "Gets the weather") },
}))
{
}

[Description("Gets the weather")]
static string GetWeather() => Random.Shared.NextDouble() > 0.5 ? "It's sunny" : "It's raining";

`

Code snippets

OS

win11

.NET version

.net8.0

Library version

OpenAI 2.2.0-beta.4

[ashishjangir]

i m facing same issue still

[joseharriaga]

Thank you for reaching out, @535944903 ! When you say it fails, what is the error that you're getting?

[ashishjangir]

//var end_point = "https://generativelanguage.googleapis.com/v1beta/openai/";
//var model = "gemini-2.0-flash";

at OpenAI.Argument.AssertNotNullOrEmpty(String value, String name)
at OpenAI.Chat.ChatToolCall.CreateFunctionToolCall(String id, String functionName, BinaryData functionArguments)
at Microsoft.Extensions.AI.OpenAIChatClient.d__13.MoveNext()
at System.Collections.Generic.List1..ctor(IEnumerable1 collection)
at System.Linq.Enumerable.ToList[TSource](IEnumerable1 source) at OpenAI.Chat.ChatClient.CreateChatCompletionOptions(IEnumerable1 messages, ChatCompletionOptions& options, Boolean stream)
at OpenAI.Chat.ChatClient.CompleteChatStreamingAsync(IEnumerable1 messages, ChatCompletionOptions options, CancellationToken cancellationToken) at Microsoft.Extensions.AI.OpenAIChatClient.GetStreamingResponseAsync(IEnumerable1 messages, ChatOptions options, CancellationToken cancellationToken)
at Microsoft.Extensions.AI.DelegatingChatClient.GetStreamingResponseAsync(IEnumerable1 messages, ChatOptions options, CancellationToken cancellationToken) at Microsoft.Extensions.AI.LoggingChatClient.<>n__1(IEnumerable1 messages, ChatOptions options, CancellationToken cancellationToken)
at Microsoft.Extensions.AI.LoggingChatClient.d__7.MoveNext()
at Microsoft.Extensions.AI.LoggingChatClient.d__7.System.Threading.Tasks.Sources.IValueTaskSource<System.Boolean>.GetResult(Int16 token)
at Microsoft.Extensions.AI.FunctionInvokingChatClient.d__25.MoveNext()
at Microsoft.Extensions.AI.FunctionInvokingChatClient.d__25.MoveNext()
at Microsoft.Extensions.AI.FunctionInvokingChatClient.d__25.System.Threading.Tasks.Sources.IValueTaskSource<System.Boolean>.GetResult(Int16 token)
at ai_chatbot_tools.Components.Pages.Chat.Chat.d__9.MoveNext() in D:\OFFICE PROJECT\ai-chatbot-tools\ai_chatbot_tools\Components\Pages\Chat\Chat.razor:line 124
at ai_chatbot_tools.Components.Pages.Chat.Chat.d__9.MoveNext() in D:\OFFICE PROJECT\ai-chatbot-tools\ai_chatbot_tools\Components\Pages\Chat\Chat.razor:line 124