Generation post-processing doesn't produce citations

[molokanov50]

Checked other resources

• I added a very descriptive title to this issue.
• I searched the LangChain documentation with the integrated search.
• I used the GitHub search to find a similar question and didn't find it.
• I am sure that this is a bug in LangChain rather than my code.
• The bug is not resolved by updating to the latest stable version of LangChain (or the specific integration package).

Example Code

from langchain_huggingface import ChatHuggingFace, HuggingFacePipeline

llmPre = HuggingFacePipeline.from_model_id(
            model_id='RefalMachine/RuadaptQwen2.5-14B-Instruct',
            task="text-generation",
            pipeline_kwargs=dict(
                max_new_tokens=512,
                do_sample=False,
                repetition_penalty=1.03,
            ),
        )

llm = ChatHuggingFace(llm=llmPre)

Error Message and Stack Trace (if applicable)

No response

Description

With the abovementioned initialization of llm, no annotations are produced according to Generation post-processing section of documentation.
E.g., I checked result["annotation"], it's always None.

System Info

System Information

OS: Linux
OS Version: #141~20.04.1-Ubuntu SMP Thu Jan 16 18:38:51 UTC 2025
Python Version: 3.11.4 (main, Jul 5 2023, 13:45:01) [GCC 11.2.0]

Package Information

langchain_core: 0.3.29
langchain: 0.3.14
langchain_community: 0.3.14
langsmith: 0.2.10
langchain_huggingface: 0.1.2
langchain_milvus: 0.1.8
langchain_text_splitters: 0.3.5
langgraph_sdk: 0.1.51

Optional packages not installed

langserve

Other Dependencies

aiohttp: 3.11.11
async-timeout: Installed. No version info available.
dataclasses-json: 0.6.7
httpx: 0.28.1
httpx-sse: 0.4.0
huggingface-hub: 0.27.1
jsonpatch: 1.33
langsmith-pyo3: Installed. No version info available.
numpy: 1.26.4
orjson: 3.10.14
packaging: 24.2
pydantic: 2.10.5
pydantic-settings: 2.7.1
pymilvus: 2.5.3
PyYAML: 6.0.2
requests: 2.32.3
requests-toolbelt: 1.0.0
sentence-transformers: 3.3.1
SQLAlchemy: 2.0.37
tenacity: 9.0.0
tokenizers: 0.21.0
transformers: 4.48.0
typing-extensions: 4.12.2
zstandard: Installed. No version info available.