#3615: GHCi doesn't allow the use of imported data contructors
---------------------+------------------------------------------------------
Reporter: blamario | Owner:
Type: bug | Status: new
Priority: normal | Component: Compiler
Version: 6.10.4 | Severity: normal
Keywords: | Testcase:
Os: Linux | Architecture: x86
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There are two modules in this simplified scenario. The main module is
Main.hs and contains the following three lines of code.
{{{
module Main where
import Imp (D(..))
main = print D1
}}}
Module Imp contains a single data type definition:
{{{
module Imp where
data D = D1 | D2 deriving Show
}}}
Now, when I compile Main everything works. GHCi doesn't complain when it
loads the main module either, but it doesn't allow me to construct D on
its command line. This makes no sense to me.
{{{
$ ghc --make Main.hs
[1 of 2] Compiling Imp ( Imp.hs, Imp.o )
[2 of 2] Compiling Main ( Main.hs, Main.o )
Linking Main ...
$ ./Main
D1
$ ghci Main.hs
GHCi, version 6.10.4: http://www.haskell.org/ghc/ :? for help
Loading package ghc-prim ... linking ... done.
Loading package integer ... linking ... done.
Loading package base ... linking ... done.
Ok, modules loaded: Main, Imp.
Prelude Main> D1
<interactive>:1:0: Not in scope: data constructor `D1'
Prelude Main>
}}}
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3615>
GHC <http://www.haskell.org/ghc/>
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