1467.lean:8:0: error: subst tactic failed, hypothesis 'H' is not of the form (x = t) or (t = x) state: m : ℕ, n : ℕ := g m, H : f n = m ⊢ h m = h m 1467.lean:18:0: error: subst tactic failed, hypothesis 'H' is not of the form (x = t) or (t = x) state: m : ℕ, n : ℕ := ?m_1, H : f n = m ⊢ h m = h m 1467.lean:25:0: error: subst tactic failed, hypothesis 'm' is not a variable nor an equation of the form (x = t) or (t = x) state: m : ℕ, n : ℕ := g m, H : f n = m ⊢ h m = h m 1467.lean:35:0: error: subst tactic failed, hypothesis 'm' is not a variable nor an equation of the form (x = t) or (t = x) state: m : ℕ, n : ℕ := ?m_1, H : f n = m ⊢ h m = h m 1467.lean:42:0: error: clear tactic failed, hypothesis 'a' depends on 'p' state: m p : ℕ, a : ℕ := g p, n : ℕ := g a ⊢ h m = h m