runTacticMustCatchExceptions.lean:2:25-2:28: error: type mismatch
  Iff.rfl
has type
  ?m ↔ ?m : Prop
but is expected to have type
  1 ≤ a + b : Prop
runTacticMustCatchExceptions.lean:3:25-3:28: error: type mismatch
  Iff.rfl
has type
  ?m ↔ ?m : Prop
but is expected to have type
  a + b ≤ b : Prop
runTacticMustCatchExceptions.lean:4:25-4:28: error: type mismatch
  Iff.rfl
has type
  ?m ↔ ?m : Prop
but is expected to have type
  b ≤ 2 : Prop
runTacticMustCatchExceptions.lean:9:18-9:21: error: type mismatch
  Iff.rfl
has type
  ?m ↔ ?m : Prop
but is expected to have type
  1 ≤ a + b : Prop
runTacticMustCatchExceptions.lean:10:14-10:17: error: type mismatch
  Iff.rfl
has type
  ?m ↔ ?m : Prop
but is expected to have type
  a + b ≤ b : Prop
runTacticMustCatchExceptions.lean:11:14-11:17: error: type mismatch
  Iff.rfl
has type
  ?m ↔ ?m : Prop
but is expected to have type
  b ≤ 2 : Prop