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Module Short.
Set Universe Polymorphism.
Inductive relevant (A : Type) (B : Type) : Prop := .
Section foo.
Variables A B : Type.
Definition foo := prod (relevant A B) A.
End foo.
Section bar.
Variable A : Type.
Variable B : Type.
Definition bar := prod (relevant A B) A.
End bar.
Set Printing Universes.
Check bar nat Set : Set. (* success *)
Check foo nat Set : Set. (* Toplevel input, characters 6-17:
Error:
The term "foo (* Top.303 Top.304 *) nat Set" has type
"Type (* Top.304 *)" while it is expected to have type
"Set" (Universe inconsistency: Cannot enforce Top.304 = Set because Set
< Top.304)). *)
End Short.
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