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fix(core): revert "fix: tool call streaming bug with inconsistent indices from Qwen3" (#32307)

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Reverts langchain-ai/langchain#32160

Original issue stems from using `ChatOpenAI` to interact with a `qwen`
model. Recommended to use
[langchain-qwq](https://python.langchain.com/docs/integrations/chat/qwq/)
which is built for Qwen
This commit is contained in:
Mason Daugherty
2025-07-29 10:26:38 -04:00
committed by GitHub
parent fc2f66ca80
commit fbd5a238d8
2 changed files with 0 additions and 95 deletions
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33
libs/core/langchain_core/utils/_merge.py
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@@ -108,39 +108,6 @@ def merge_lists(left: Optional[list], *others: Optional[list]) -> Optional[list]
else e
)
merged[to_merge[0]] = merge_dicts(merged[to_merge[0]], new_e)
# Special handling for tool call chunks: if this chunk appears to be
# a continuation of a prior chunk (has None name/id) and no matching
# index was found, try to merge with the most recent tool call chunk
# that has a name/id.
# Fixes issues with models that send inconsistent indices.
# See #31511 for more.
elif (
e.get("type") == "tool_call_chunk"
and e.get("name") is None
and e.get("id") is None
and merged
):
# Find the most recent tool call chunk with a valid name or id
for i in reversed(range(len(merged))):
if (
isinstance(merged[i], dict)
and merged[i].get("type") == "tool_call_chunk"
and (
merged[i].get("name") is not None
or merged[i].get("id") is not None
)
):
# Merge with this chunk
new_e = (
{k: v for k, v in e.items() if k != "type"}
if "type" in e
else e
)
merged[i] = merge_dicts(merged[i], new_e)
break
else:
# No suitable chunk found, append as new
merged.append(e)
else:
merged.append(e)
else: