bad_pattern2.lean:2:2: error: invalid pattern: variable, constructor or constant tagged as pattern expected
bad_pattern2.lean:2:13: error: unknown identifier 'bla.boo'
bad_pattern2.lean:2:2: error: type mismatch at application
  foo bla.boo
term
  bla.boo
has type
  _
but is expected to have type
  ℕ
bad_pattern2.lean:2:10: error: ill-formed match/equation expression