haskell - tyConPackage changed from ghc-7.8 to ghc-7.10? -


this ghci session

import data.map import data.typeable tyconpackage $  typereptycon $  typeof $ fromlist [(1,2)]

gives 

in ghc-7.8.4: "containers-0.5.5.1" in ghc-7.10.1: "conta_47ajk3tbda43dfwyef3ohq"

the new behaviour breaks application, use string programmatically construct documentation urls (pointing html built standalone-haddock)

is there way old behaviour? work-around?

--

i did more research , found (ghc/compiler/basictypes/module.lhs):

7.8.4 (compiler/typecheck/tcgenderiv builds instance and) uses

-- | string identifying package, including version: e.g. parsec-1.0 newtype packageid = pid faststring deriving( eq, typeable )

7.10.1 (compiler/desugar/dsbinds constructs evidence(?) and) uses

-- | string uniquely identifies package.  wired-in packages, -- package name, user compiled packages, hash. newtype packagekey = pid faststring deriving( eq, typeable )

well, "uniquely identify" nice, ...

--

on other hand, ghci somehow knows (ungarbled) package name:

import data.map ; :i map data map k = containers-0.5.5.1:data.map.base.bin ...

but that's @ compile time - still hope info available @ runtime someplace.


-

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