Commit bd25285f authored by Mikhail Glushenkov's avatar Mikhail Glushenkov

Add a FIXME.

parent d6545bc2
......@@ -106,6 +106,8 @@ data PackageIndex = PackageIndex
-- of the same package version. These are unique by InstalledPackageId
-- and are kept in preference order.
--
-- FIXME: Clarify what "preference order" means. Check that this invariant is
-- preserved. See #1463 for discussion.
!(Map PackageName (Map Version [InstalledPackageInfo]))
deriving (Show, Read)
......
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