unit8co/darts

Improve error message when future covariates are missing during backtest() call

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#2.846 aberto em 18 de jul. de 2025

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Description

Is your feature request related to a current problem? Please describe. Yes.When using backtest() with a model trained with train and val future covariates, forgetting to pass the full future covariates again at backtest time results in an error (IndexError: index 1 is out of bounds for axis 0 with size 1.).

Describe proposed solution A better explanation or error message should be thrown as it is the case for "regular" historical forecasts.

Additional context Error currently thrown :

IndexError: index 1 is out of bounds for axis 0 with size 1.

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