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Compiler complains about duplicate instance declarations: msg#00028

lang.haskell.glasgow.bugs

Subject: Compiler complains about duplicate instance declarations

Hi

I've attached a minimal example, which makes the compiler complain in error
about multiple instance declarations. Run "make" twice.

~/src/hsskripte/bugrep $ make
ghc --make mtest.hs
Chasing modules from: mtest.hs
Compiling Schema ( ./Schema.hs, ./Schema.o )
Compiling Datenbank ( ./Datenbank.hs, ./Datenbank.o )
Compiling Main ( mtest.hs, mtest.o )
Linking ...

~/src/hsskripte/bugrep $ make
ghc --make mtest.hs
Chasing modules from: mtest.hs
Skipping Schema ( ./Schema.hs, ./Schema.o )
Skipping Datenbank ( ./Datenbank.hs, ./Datenbank.o )

Duplicate instance declarations:
In module Datenbank: GHC.Base.Eq Datenbank.Praedikat
In module Datenbank: GHC.Base.Eq Datenbank.Praedikat

Duplicate instance declarations:
In module Datenbank: GHC.Show.Show Datenbank.Praedikat
In module Datenbank: GHC.Show.Show Datenbank.Praedikat
make: *** [mtest] Fehler 1

Greetings,
Volker

Attachment: bugrep.tar.gz
Description: application/tgz

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