lean4-htt/tests/lean/255.lean

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def x := 1
section
variable (α : Type)
variable (x : α)
notation "A" => id x
#check A
theorem test : A = A := rfl
section
variable (x : Nat)
#check A -- should use shadowed `x`
end
end
#check A -- escaping section variable, should fail
section
variable (x : Nat)
#check A -- should fail
end