14 lines
474 B
Text
14 lines
474 B
Text
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subst_bug.lean:4:2: error:invalid 'subst' tactic, 'a' occurs in the other side of the equation
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proof state:
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f : nat → nat,
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a b : nat,
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h₁ : f a = a
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⊢ f (f a) = a
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subst_bug.lean:5:0: error: don't know how to synthesize placeholder
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f : nat → nat,
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a b : nat
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⊢ f a = a → f (f a) = a
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subst_bug.lean:5:0: error: failed to add declaration 'example' to environment, value has metavariables
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remark: set 'formatter.hide_full_terms' to false to see the complete term
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?M_1
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