fails-to-dataize-an-empty-formation.yaml

# SPDX-FileCopyrightText: Copyright (c) 2025 Objectionary.com
# SPDX-License-Identifier: MIT
---
# The 'none' rule dataizes ⊥ (𝔻(⟦⟧) → 𝔻(⊥)), which matches no clause now that
# there is no 'end' rule, so an empty formation reduces through one labelled
# 'dataize' step and then fails: it has nothing to dataize (#955).
input: '[[ ]]'
fails: 'terminator'