#16387: Duplicate vsnwprintf symbol on Windows -------------------------------------+------------------------------------- Reporter: bgamari | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.6.3 Keywords: | Operating System: Unknown/Multiple Architecture: | Type of failure: None/Unknown Unknown/Multiple | Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: -------------------------------------+------------------------------------- Leading to failure of `T5836`: ``` Stderr ( T5836 ): GHC runtime linker: fatal error: I found a duplicate definition for symbol __mingw_vsnwprintf whilst processing object file C:\GitLabRunner\builds\8fc0e283\0\ghc\ghc\inplace\mingw\x86_64-w64-mingw32\lib\libmingwex.a The symbol was previously defined in (GHCi built-in symbols) 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-stage2.exe: panic! (the 'impossible' happened) (GHC version 8.9.20190303 for x86_64-unknown-mingw32): loadArchive "C:\\GitLabRunner\\builds\\8fc0e283\\0\\ghc\\ghc\\inplace\\mingw\\x86_64-w64-mingw32\\lib\\libmingwex.a": failed Please report this as a GHC bug: https://www.haskell.org/ghc/reportabug *** unexpected failure for T5836(ghci) ``` -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/16387 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler