local attribute as prefix breaks doc comments

[digama0]

MWE:

/-- `foo` is awesome -/
local attribute [simp] -- command does not accept doc string
def foo := false

local attribute [simp]        -- unknown declaration '_'
/-- `bar` is awesome too -/   -- invalid 'attribute' command, constant expected
def bar := true

/-- `baz` is the best -/
def baz : Prop := sorry
local attribute [simp] baz -- works

Actually you get the same behavior with attribute [simp] def foo, but in that case there is the alternative syntax @[simp] def foo which works.