9 lines
312 B
Text
9 lines
312 B
Text
cases_unsupported_equality.lean:6:3: error: cases tactic failed, unsupported equality between type and constructor indices
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(only equalities between constructors and/or variables are supported, try cases on the indices):
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f n = 0
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state:
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n : ℕ,
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f : ℕ → ℕ,
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h : foo (f n)
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⊢ f n = 0 → h == foo.a → true
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