GHC runtime linker: fatal error: I found a duplicate definition for symbol

I found GHC panic when using both inline-c and local Win32 package.

I don't know whether it's related to #6107 (closed).

D:\ghc-bug-maybe>stack build
Win32a-2.3.1.0: build
Win32a-2.3.1.0: copy/register
ghc-bug-maybe-0.1.0.0: configure
ghc-bug-maybe-0.1.0.0: build
Completed 2 action(s).

--  While building package ghc-bug-maybe-0.1.0.0 using:
      C:\AppData\Roaming\stack\setup-exe-cache\x86_64-windows\setup-Simple-Cabal-1.22.5.0-ghc-7.10.3.exe --builddir=.stack-work\dist\2672c1f3 build lib:ghc-bug-maybe exe:DualternativeH-exe --ghc-options " -ddump-hi -ddump-to-file"
    Process exited with code: ExitFailure 1
    Logs have been written to: D:\ghc-bug-maybe\.stack-work\logs\ghc-bug-maybe-0.1.0.0.log

    Configuring ghc-bug-maybe-0.1.0.0...
    Preprocessing library ghc-bug-maybe-0.1.0.0...
    [1 of 1] Compiling Lib              ( src\Lib.hs, .stack-work\dist\2672c1f3\build\Lib.o )
    GHC runtime linker: fatal error: I found a duplicate definition for symbol
       rgb
    whilst processing object file
       D:\ghc-bug-maybe\.stack-work\install\0464eb7a\lib\x86_64-windows-ghc-7.10.3\Win32a-2.3.1.0-JATTCAFziPX9UILXdwDTPA\HSWin32a-2.3.1.0-JATTCAFziPX9UILXdwDTPA.o
    This could be caused by:
       * Loading two different object files which export the same symbol
       * Specifying the same object file twice on the GHCi command line
       * An incorrect `package.conf' entry, causing some object to be
         loaded twice.
    ghc.exe: panic! (the 'impossible' happened)
      (GHC version 7.10.3 for x86_64-unknown-mingw32):
        loadObj "D:\\ghc-bug-maybe\\.stack-work\\install\\0464eb7a\\lib\\x86_64-windows-ghc-7.10.3\\Win32a-2.3.1.0-JATTCAFziPX9UILXdwDTPA\\HSWin32a-2.3.1.0-JATTCAFziPX9UILXdwDTPA.o": failed

    Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug

Trac metadata

Trac field	Value
Version	7.10.3
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler (Linking)
Test case
Differential revisions
BlockedBy
Related
Blocking
CC
Operating system
Architecture	x86_64 (amd64)