lean2/tests/lean/revert_fail.lean

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import data.vector
example (A : Type) (n : nat) (v : vector A n) : v = v :=
begin
revert n
end
example (n : nat) : n = n :=
begin
esimp,
revert n
end
example (n : nat) : n = n :=
begin
revert m
end