Confusing error message from GHCI - "defined in multiple files" shows the same file
I just had the following very confusing exchange with GHCI:
λ :load
Ok, modules loaded: none.
λ :load src/Application/Aws.hs
Ok, modules loaded: Application.Aws (dist/build/Application/Aws.o).
λ private
<interactive>:3:1: error: Variable not in scope: private
λ :m *Application.Aws
module 'Application.Aws' is not interpreted; try ':add *Application.Aws' first
λ :add *Application.Aws
<no location info>: error:
module ‘circuithub-api-0.0.4-EeGo4QUTODrB58BZrr3htj:Application.Aws’ is defined in multiple files: src/Application/Aws.hs
src/Application/Aws.hs
Failed, modules loaded: Application.Aws (dist/build/Application/Aws.o).
λ :! ghc --version
The Glorious Glasgow Haskell Compilation System, version 8.1.20161115
This can really be simplified to
λ :load src/Application/Aws.hs
Ok, modules loaded: Application.Aws (dist/build/Application/Aws.o).
λ :add *Application.Aws
<no location info>: error:
module ‘circuithub-api-0.0.4-EeGo4QUTODrB58BZrr3htj:Application.Aws’ is defined in multiple files: src/Application/Aws.hs
src/Application/Aws.hs
Failed, modules loaded: Application.Aws (dist/build/Application/Aws.o).
For the record, here is Application.Aws:
{-# LANGUAGE DeriveDataTypeable #-}
module Application.Aws
( AwsExtra(..)
) where
import Prelude
import Data.Data (Data)
import Data.ByteString.Char8
import Data.Text
data AwsExtra = AwsExtra
{ awsKey :: ByteString
, awsSecret :: ByteString
, awsS3AssetsBucket :: Text
} deriving (Show,Data)
private :: Int
private = 42
Trac metadata
Trac field | Value |
---|---|
Version | 8.1 |
Type | Bug |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | GHCi |
Test case | |
Differential revisions | |
BlockedBy | |
Related | |
Blocking | |
CC | |
Operating system | |
Architecture |