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Set coeffect issues #308

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Set coeffect issues #308

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7 changes: 6 additions & 1 deletion frontend/src/Language/Granule/Checker/Kinding.hs
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Original file line number Diff line number Diff line change
Expand Up @@ -1303,7 +1303,12 @@ requiresSolver s ty = do
case result of
-- Checking as coeffect or effect caused an error so ignore
Left _ -> return False
Right _ -> putChecker >> return True
Right _ ->
-- avoid putting sets into the solver as the solver is weak on this
case isSet ty of
Just _ -> putChecker >> return False
Nothing ->
putChecker >> return True

instance Unifiable Substitutors where
unify' (SubstT t) (SubstT t') = unify' t t'
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3 changes: 3 additions & 0 deletions frontend/tests/cases/negative/simple/set.gr.output
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@@ -0,0 +1,3 @@
Type checking failed:
Falsifiable theorem: frontend/tests/cases/negative/simple/set.gr:14:1:
When checking `non-example`, {Contacts} is not approximatable by {Location} for type Set Privilege
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