18 lines
522 B
Text
18 lines
522 B
Text
show_tac.lean:6:29: error: don't know how to synthesize placeholder
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a b : Prop,
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Hab : a ∧ b,
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Ha : a,
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Hb : b
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⊢ b
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show_tac.lean:6:2: error:invalid 'exact' tactic, term still contains metavariables after elaboration
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show b ∧ a, from and.intro ?M_1 Ha
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proof state:
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a b : Prop,
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Hab : a ∧ b,
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Ha : a,
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Hb : b
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⊢ b ∧ a
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show_tac.lean:7:0: 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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λ a b Hab,
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?M_1
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