[GHC] #10279: panic on haskell-src-exts

[GHC]

#10279: panic on haskell-src-exts
-------------------------------------+-------------------------------------
        Reporter:  throwaway123      |                   Owner:  ezyang
            Type:  bug               |                  Status:  new
        Priority:  normal            |               Milestone:
       Component:  Compiler          |                 Version:  7.10.1
      Resolution:                    |                Keywords:
Operating System:  Linux             |            Architecture:  x86_64
 Type of failure:  Compile-time      |  (amd64)
  crash                              |               Test Case:
      Blocked By:                    |                Blocking:
 Related Tickets:                    |  Differential Revisions:
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Comment (by rwbarton):

 Replying to [comment:10 simonpj]:
 > 1. Add a new function
 > {{{
 > reifyPackage :: String   -- Package name
 >              -> String   -- Version
 >              -> Q [Package]
 > }}}
 >   which, given a package name/version returns all the installed packages
 with that name and version.

 I'm a little worried that this will encourage the people who previously
 wrote things like
 {{{
 pkg = "haskell-src-exts-" ++ VERSION_haskell_src_exts
 }}}
 to instead call
 {{{
 [pkg] <- reifyPackage "haskell-src-exts" VERSION_haskell_src_exts
 }}}
 just hoping that the result is a single package version.

 I'm not up to speed on the context here, but would it be possible to also
 provide
 {{{
 thisPackage :: Q Package    -- or maybe just :: Package
 }}}
 that refers to the package currently being built?

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10279#comment:12>
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