Default print handler only prints tool calls when LLM uses streaming

[tarmst]

Description

If the LLM is set to not use streaming by setting a different model, the default print handler will print output text, but not tool calls. I have confirmed that the tool calls are being output by the model.

Example Code

from langchain_openai import ChatOpenAI
import controlflow as cf

cf.settings.tools_verbose = True
cf.settings.default_print_handler_show_completion_tool_results = True
cf.settings.enable_default_print_handler = True

model = ChatOpenAI(
    model_name="model-name",
    base_url="base_url",
    api_key="none",
    disable_streaming=True,
    temperature=0.01,
)

cf.defaults.model = model

Version Information

ControlFlow version: 0.12.1                                      
       Prefect version: 3.2.2                                       
LangChain Core version: 0.3.34                                      
        Python version: 3.10.11                                     
              Platform: Linux-6.2.0-39-generic-x86_64-with-glibc2.31

LLM provider: tried both vLLM and Ollama.

Additional Context

No response