#490: cabal unpack gives bad error message for unsatisfiable constraints ---------------------------------+------------------------------------------ Reporter: duncan | Owner: Type: defect | Status: new Priority: normal | Milestone: cabal-install-0.6 Component: cabal-install tool | Version: 1.6.0.1 Severity: normal | Resolution: Keywords: | Difficulty: very easy (<1 hour) Ghcversion: | Platform: ---------------------------------+------------------------------------------ Comment (by Saizan): With the attached patch we have: {{{ $ cabal unpack haxml-1.20 cabal: There is no available version of HaXml that satisfies ==1.20 }}} {{{ $ cabal unpack containers haxml-1.20 array 'containers-0.2.0.0' is cached. Unpacking containers-0.2.0.0... cabal: There is no available version of HaXml that satisfies ==1.20 }}} {{{ $ cabal unpack containers nonexistant cabal: There is no package named nonexistant }}} So, non-existant package names make unpack die early, while non-resolvable deps for existing packages make it die on the first one encountered while fetching, like other fetching-related problems (e.g. downloading or extracting). -- Ticket URL: http://hackage.haskell.org/trac/hackage/ticket/490#comment:1 Hackage http://haskell.org/cabal/ Hackage: Cabal and related projects