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Order dependent elaboration due to universe constraints #1058

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digama0 opened this issue Mar 21, 2022 · 0 comments

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digama0 commented Mar 21, 2022 •

edited

The by exact is necessary in this example:

example : List (Unit -> Nat) :=
  let g := [by exact fun _ => 0]; g -- ok

example : List (Unit -> Nat) :=
  let g := [fun _ => 0]; g -- fail

stuck at solving universe constraint
  ?u.61+1 =?= max ?u.45 (?u.50+1)
while trying to unify
  (x : ?m.46) → ?m.57 x : Sort (max ?u.45 (?u.50 + 1))
with
  (x : ?m.46) → ?m.57 x : Sort (max ?u.45 (?u.50 + 1))

Tested on Lean (version 4.0.0-nightly-2022-03-17, commit 0d03c6e3198c, Release).

The text was updated successfully, but these errors were encountered:

leodemoura closed this as completed in

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