keras-team/keras · error · ValueError

Invalid variable value in StatelessScope: all values in argu

Error message

Invalid variable value in StatelessScope: all values in argument `mapping` must be tensors with a shape that matches the corresponding variable shape. For variable {k}, received invalid value {v} with shape {v.shape}.

What it means

Error "Invalid variable value in StatelessScope: all values in argument `mapping` must be tensors with a shape that matches the corresponding variable shape. For variable {k}, received invalid value {v} with shape {v.shape}." thrown in keras-team/keras.

Source

Thrown at keras/src/backend/common/stateless_scope.py:61

        self.collect_losses = collect_losses
        self.initialize_variables = initialize_variables
        self.losses = []
        self.state_mapping = {}
        state_mapping = state_mapping or {}
        for k, v in state_mapping:
            if not isinstance(k, Variable):
                raise ValueError(
                    "Invalid reference variable in StatelessScope: "
                    "all keys in argument `mapping` must be Variable "
                    f"instances. Received instead: {k}"
                )
            if isinstance(v, Variable):
                v = backend.cast(v.value, dtype=k.dtype)
            else:
                v = backend.convert_to_tensor(v, dtype=k.dtype)
            if k.shape != v.shape:
                raise ValueError(
                    "Invalid variable value in StatelessScope: "
                    "all values in argument `mapping` must be tensors with "
                    "a shape that matches the corresponding variable shape. "
                    f"For variable {k}, received invalid value {v} with shape "
                    f"{v.shape}."
                )
            self.state_mapping[id(k)] = v

    def __enter__(self):
        self.original_scope = get_stateless_scope()
        global_state.set_global_attribute("stateless_scope", self)
        return self

    def add_loss(self, loss):
        self.losses.append(loss)

    def add_update(self, update):
        variable, value = update

View on GitHub (pinned to 7a34a03db6)

When it happens

Trigger: Thrown at keras/src/backend/common/stateless_scope.py:61 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of keras-team/keras@7a34a03db6 (2026-08-25). Data as JSON: /api/errors/a88916e5ca1b60c6. Report an issue: GitHub.