langchain-ai/langgraph · error · RuntimeError

Cannot patch execution_info before it has been set

Error message

Cannot patch execution_info before it has been set

What it means

Error "Cannot patch execution_info before it has been set" thrown in langchain-ai/langgraph.

Source

Thrown at libs/langgraph/langgraph/runtime.py:270

            if other.heartbeat is not _no_op_heartbeat
            else self.heartbeat,
            previous=self.previous if other.previous is None else other.previous,
            execution_info=other.execution_info or self.execution_info,
            server_info=other.server_info or self.server_info,
            control=other.control or self.control,
        )

    def override(
        self, **overrides: Unpack[_RuntimeOverrides[ContextT]]
    ) -> Runtime[ContextT]:
        """Replace the runtime with a new runtime with the given overrides."""
        return replace(self, **overrides)

    def patch_execution_info(self, **overrides: Any) -> Runtime[ContextT]:
        """Return a new runtime with selected execution_info fields replaced."""
        if self.execution_info is None:
            msg = "Cannot patch execution_info before it has been set"
            raise RuntimeError(msg)
        return replace(
            self,
            execution_info=self.execution_info.patch(**overrides),
        )

    @property
    def drain_requested(self) -> bool:
        return self.control.drain_requested if self.control is not None else False

    @property
    def drain_reason(self) -> str | None:
        return self.control.drain_reason if self.control is not None else None


DEFAULT_RUNTIME = Runtime(
    context=None,
    store=None,
    stream_writer=_no_op_stream_writer,

View on GitHub (pinned to 38031739e5)

When it happens

Trigger: Thrown at libs/langgraph/langgraph/runtime.py:270 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of langchain-ai/langgraph@38031739e5 (2026-08-26). Data as JSON: /api/errors/23208a1f268a696a. Report an issue: GitHub.