#1465: Type errors due to different package versions are a bit cryptic
--------------------------------------+-------------------------------------
Reporter: guest | Owner:
Type: feature request | Status: new
Priority: normal | Milestone:
Component: Compiler (Type checker) | Version: 6.6.1
Severity: normal | Keywords:
Difficulty: Easy (1 hr) | Os: Unknown
Testcase: | Architecture: Unknown
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Users of xmonad who've compiled one dependent library against X11 1.2, and
then update X11, and attempt to recompile xmonad against the new X11
1.2.2, get a cryptic type error:
{{{
Couldn't match expected type `Graphics.X11.Xlib.Types.Display'
against inferred type `Display'
}}}
Perhaps non-local types should be printed with their package name and
version, which would clarify this error. Something like:
{{{
Couldn't match expected type `X11-1.2:
Graphics.X11.Xlib.Types.Display'
against inferred type `X11-1.2.2: Display'
}}}
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/1465>
GHC <http://www.haskell.org/ghc/>
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