information
  macro m/0
  end macro
end information

# (information (@ 1 0-11)
#   (.inner
#     (macro (@ 2 2-7) ‘m/0’
#       (.inner nil)
#     )
#   )
# )
# :2:2–7: error: macro definition inside information clause
#    macro m/0
#    ^^^^^
# :1:0–11: note: outer information clause defined here
#  information
#  ^^^^^^^^^^^