Comments (1)
palmskog
commented on July 18, 2024
Here is a minimal test case that triggers the universe constraint problem in Coq 8.10 to 8.15, but not in Coq 8.9.
Require PeanoNat List.
From AAC_tactics Require Import AAC.
From AAC_tactics Require Instances.
Section Lists.
Import List.
Import Instances.Lists.
Variables (X : Type) (l1 l2 l3 : list X).
Goal l1 ++ (l2 ++ l3) = (l1 ++ l2) ++ l3.
aac_reflexivity.
Qed.
End Lists.
An example error message from 8.10 is:
The 1st term has type "Type@{max(Set,AAC_tactics.test.1)}"
which should be coercible to "Type@{AAC_tactics.AAC.263}".
My guess is that it's related to coq/coq#9918, and the fact that list is template polymorphic.
from aac-tactics.
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