#512: Use a proper exception for the 'die' utility function ----------------------------+----------------------------------------------- Reporter: duncan | Owner: Type: defect | Status: new Priority: normal | Milestone: Component: Cabal library | Version: 1.6.0.1 Severity: normal | Keywords: Difficulty: unknown | Ghcversion: Platform: | ----------------------------+----------------------------------------------- Currently the `die` function prints the error message to stderror and throws an exit with exception. This is not a good approach for library code. Instead it should throw an user error exception with the string message. A top level handler in `Distribution.Simple.main` or `cabal- install` should catch this, print it as before and throw an exit exception. See also #510 for an example of how this causes problems. The `readPackageDescription` ends up throwing the exit exception when it would be more helpful to clients for it to throw an ordinary exception containing the error message. -- Ticket URL: <http://hackage.haskell.org/trac/hackage/ticket/512> Hackage <http://haskell.org/cabal/> Hackage: Cabal and related projects