bad_pattern.lean:9:33: error: invalid pattern hint, pattern hints must be applications theorem tst₀ [forward] : ∀ (x : ℕ), P x := sorry (multi-)patterns: ?M_1 : ℕ {P ?M_1} theorem tst₁ [forward] : ∀ (x : ℕ), (:P x:) := sorry (multi-)patterns: ?M_1 : ℕ {P ?M_1} theorem tst₃ [forward] : ∀ (x : ℕ), P (:id x:) := sorry (multi-)patterns: ?M_1 : ℕ {P ?M_1} bad_pattern.lean:20:0: error: pattern inference failed for [forward] annotation, (solution: provide pattern hints using the notation '(: t :)' )