#951: Incorrect error messages for non-existing dependencies ---------------------------------+------------------------------------------ Reporter: guest | Owner: Type: defect | Status: new Priority: normal | Milestone: Component: cabal-install tool | Version: 1.14.0 Severity: normal | Keywords: message solver Difficulty: unknown | Ghcversion: 7.4.1 Platform: Linux | ---------------------------------+------------------------------------------ When the build-depends-field contains non-existing packages, cabal-install sometimes does not report that these packages could not be found but complains about other constraints being unsolvable. The attached cabal-file contains a dependency for a non-existing package called "bogus". This is what I get: {{{ $ cabal install --only-dependencies --dry-run Resolving dependencies... cabal: Could not resolve dependencies: next goal: foo (user goal) rejecting: foo-1.0 (global constraint requires ==0.1.0.0) trying: foo-0.1.0.0 trying: heist-0.8.0 (dependency of foo-0.1.0.0) trying: transformers-0.3.0.0 (dependency of heist-0.8.0) next goal: mtl (dependency of heist-0.8.0) rejecting: mtl-2.1.1, 2.1 (conflict: heist => mtl>=2.0 && <2.1) rejecting: mtl-2.0.1.0, 2.0.0.0 (conflict: transformers==0.3.0.0, mtl => transformers==0.2.*) rejecting: mtl-1.1.1.1, 1.1.1.0, 1.1.0.2, 1.1.0.1, 1.1.0.0, 1.0 (conflict: heist => mtl>=2.0 && <2.1) }}} When removing "bogus" from the build-depends, cabal-install is able to come up with a working install plan. Used versions: {{{ $ cabal --version cabal-install version 0.14.0 using version 1.14.0 of the Cabal library }}} -- Ticket URL: http://hackage.haskell.org/trac/hackage/ticket/951 Hackage http://haskell.org/cabal/ Hackage: Cabal and related projects