Re: The PVP ought to mention dependency bounds (Was: Growing Haskell Platform)

On 8 December 2012 00:41, Ian Lynagh wrote:

On Fri, Dec 07, 2012 at 08:30:45AM -0800, Johan Tibell wrote:

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On Fri, Dec 7, 2012 at 8:28 AM, Ian Lynagh wrote:

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On Fri, Dec 07, 2012 at 08:20:41AM -0800, Johan Tibell wrote:

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If B only bumps its patch-level version (i.e. to B-1.0.0.1), C no longer compiles (due to a version constraint failure) with B-1.0.0.1

Won't cabal-install select B-1.0 in that case, so installing C will still work?

See my aside at the end. Yes, it will backtrack and use the older version, but the users might get confused why the new version isn't used as it's version number suggests that it could be.

I don't think most users would notice, and for those that do the "-v" flag to cabal-install ought to tell them why.

I don't think this (theoretical?) confusion issue is worth the effort of bumping major versions all the way up the dependency tree.

What if the minor version bump in B is for fixing a security issue? Conrad.