[Haskell-cafe] GHC linker error 8.8.4 Windows

[Sumit Raja]

Hi,

Suddenly started getting the following linker error after I moved code
around in my project. It only seems to occur when I am building one
specific cabal test target. When building a dependent build it build
successfully but cabal repl test-xxx  fails. I have no consistent way to
repro but I will keep trying and file a defect..

GHCi, version 8.8.4: https://www.haskell.org/ghc/  :? for help
GHC runtime linker: fatal error: I found a duplicate definition for symbol
   __gmpn_sec_sqr_itch
whilst processing object file
   C:\Users\sumit\Apps\ghc-8.8.4\mingw\lib\libgmp.dll.a
The symbol was previously defined in

 C:\Users\sumit\Apps\ghc-8.8.4\lib\integer-gmp-1.0.2.0\HSinteger-gmp-1.0.2.0.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 8.8.4 for x86_64-unknown-mingw32):
        loadArchive
"C:\\Users\\sumit\\Apps\\ghc-8.8.4\\mingw\\lib\\libgmp.dll.a": failed

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

CallStack (from HasCallStack):
  die', called at .\\Distribution\\Client\\ProjectOrchestration.hs:1041:55
in main:Distribution.Client.ProjectOrchestration
cabal.exe: repl failed for mkr-txn-0.1.0.0-inplace-test-mkr-txn.

Regards
Sumit
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