add a function to help identify unique predecessors
add a function to help identify unique predecessors
mfine/ghc,mcmaniac/ghc,bitemyapp/ghc,vTurbine/ghc,vikraman/ghc,spacekitteh/smcghc,mcmaniac/ghc,nomeata/ghc,acowley/ghc,anton-dessiatov/ghc,elieux/ghc,mcschroeder/ghc,hferreiro/replay,ghc-android/ghc,elieux/ghc,christiaanb/ghc,urbanslug/ghc,lukexi/ghc,jstolarek/ghc,tibbe/ghc,oldmanmike/ghc,ryantm/ghc,GaloisInc/halvm-ghc,shlevy/ghc,vTurbine/ghc,mcmaniac/ghc,sgillespie/ghc,ghc-android/ghc,tjakway/ghcjvm,olsner/ghc,sdiehl/ghc,green-haskell/ghc,gcampax/ghc,nkaretnikov/ghc,fmthoma/ghc,nomeata/ghc,holzensp/ghc,urbanslug/ghc,mfine/ghc,urbanslug/ghc,fmthoma/ghc,ghc-android/ghc,spacekitteh/smcghc,siddhanathan/ghc,bitemyapp/ghc,christiaanb/ghc,ezyang/ghc,siddhanathan/ghc,gcampax/ghc,acowley/ghc,tjakway/ghcjvm,jstolarek/ghc,gcampax/ghc,da-x/ghc,anton-dessiatov/ghc,fmthoma/ghc,ezyang/ghc,gridaphobe/ghc,snoyberg/ghc,gridaphobe/ghc,gridaphobe/ghc,anton-dessiatov/ghc,vikraman/ghc,nomeata/ghc,nkaretnikov/ghc,da-x/ghc,mfine/ghc,lukexi/ghc-7.8-arm64,ghc-android/ghc,ml9951/ghc,holzensp/ghc,forked-upstream-packages-for-ghcjs/ghc,TomMD/ghc,sdiehl/ghc,holzensp/ghc,ekmett/ghc,ilyasergey/GHC-XAppFix,nushio3/ghc,nathyong/microghc-ghc,da-x/ghc,oldmanmike/ghc,mcschroeder/ghc,wxwxwwxxx/ghc,ml9951/ghc,ml9951/ghc,urbanslug/ghc,gcampax/ghc,elieux/ghc,fmthoma/ghc,sdiehl/ghc,gridaphobe/ghc,tjakway/ghcjvm,ekmett/ghc,ml9951/ghc,olsner/ghc,acowley/ghc,acowley/ghc,christiaanb/ghc,shlevy/ghc,acowley/ghc,mfine/ghc,fmthoma/ghc,elieux/ghc,ryantm/ghc,ghc-android/ghc,mcschroeder/ghc,nushio3/ghc,nkaretnikov/ghc,GaloisInc/halvm-ghc,da-x/ghc,lukexi/ghc-7.8-arm64,frantisekfarka/ghc-dsi,oldmanmike/ghc,hferreiro/replay,nushio3/ghc,mettekou/ghc,GaloisInc/halvm-ghc,holzensp/ghc,fmthoma/ghc,urbanslug/ghc,mcschroeder/ghc,gridaphobe/ghc,AlexanderPankiv/ghc,ilyasergey/GHC-XAppFix,lukexi/ghc-7.8-arm64,sgillespie/ghc,elieux/ghc,gridaphobe/ghc,christiaanb/ghc,nushio3/ghc,siddhanathan/ghc,forked-upstream-packages-for-ghcjs/ghc,wxwxwwxxx/ghc,tjakway/ghcjvm,siddhanathan/ghc,TomMD/ghc,ml9951/ghc,spacekitteh/smcghc,shlevy/ghc,nathyong/microghc-ghc,shlevy/ghc,gcampax/ghc,forked-upstream-packages-for-ghcjs/ghc,forked-upstream-packages-for-ghcjs/ghc,AlexanderPankiv/ghc,mettekou/ghc,mcmaniac/ghc,christiaanb/ghc,ekmett/ghc,GaloisInc/halvm-ghc,green-haskell/ghc,tibbe/ghc,snoyberg/ghc,ghc-android/ghc,vikraman/ghc,nkaretnikov/ghc,hferreiro/replay,sdiehl/ghc,mcschroeder/ghc,wxwxwwxxx/ghc,bitemyapp/ghc,shlevy/ghc,elieux/ghc,snoyberg/ghc,lukexi/ghc-7.8-arm64,GaloisInc/halvm-ghc,anton-dessiatov/ghc,TomMD/ghc,hferreiro/replay,sgillespie/ghc,mfine/ghc,green-haskell/ghc,elieux/ghc,tjakway/ghcjvm,nkaretnikov/ghc,lukexi/ghc,ekmett/ghc,sgillespie/ghc,mettekou/ghc,nomeata/ghc,mfine/ghc,urbanslug/ghc,sgillespie/ghc,oldmanmike/ghc,acowley/ghc,ghc-android/ghc,olsner/ghc,shlevy/ghc,ezyang/ghc,vikraman/ghc,forked-upstream-packages-for-ghcjs/ghc,TomMD/ghc,christiaanb/ghc,olsner/ghc,ezyang/ghc,AlexanderPankiv/ghc,gridaphobe/ghc,snoyberg/ghc,tjakway/ghcjvm,siddhanathan/ghc,anton-dessiatov/ghc,TomMD/ghc,nushio3/ghc,nathyong/microghc-ghc,vTurbine/ghc,acowley/ghc,tibbe/ghc,frantisekfarka/ghc-dsi,forked-upstream-packages-for-ghcjs/ghc,ilyasergey/GHC-XAppFix,GaloisInc/halvm-ghc,spacekitteh/smcghc,olsner/ghc,lukexi/ghc,mcschroeder/ghc,green-haskell/ghc,sgillespie/ghc,TomMD/ghc,gcampax/ghc,da-x/ghc,mcmaniac/ghc,mettekou/ghc,holzensp/ghc,AlexanderPankiv/ghc,GaloisInc/halvm-ghc,snoyberg/ghc,oldmanmike/ghc,sdiehl/ghc,tjakway/ghcjvm,ryantm/ghc,wxwxwwxxx/ghc,spacekitteh/smcghc,sdiehl/ghc,sgillespie/ghc,da-x/ghc,jstolarek/ghc,hferreiro/replay,vikraman/ghc,ekmett/ghc,sdiehl/ghc,siddhanathan/ghc,mfine/ghc,frantisekfarka/ghc-dsi,hferreiro/replay,vTurbine/ghc,bitemyapp/ghc,vikraman/ghc,wxwxwwxxx/ghc,bitemyapp/ghc,mettekou/ghc,nathyong/microghc-ghc,hferreiro/replay,da-x/ghc,nkaretnikov/ghc,nomeata/ghc,jstolarek/ghc,AlexanderPankiv/ghc,ezyang/ghc,urbanslug/ghc,siddhanathan/ghc,vikraman/ghc,nathyong/microghc-ghc,vTurbine/ghc,ryantm/ghc,ml9951/ghc,fmthoma/ghc,shlevy/ghc,tibbe/ghc,forked-upstream-packages-for-ghcjs/ghc,ml9951/ghc,snoyberg/ghc,anton-dessiatov/ghc,vTurbine/ghc,AlexanderPankiv/ghc,gcampax/ghc,tibbe/ghc,nathyong/microghc-ghc,ml9951/ghc,oldmanmike/ghc,lukexi/ghc,frantisekfarka/ghc-dsi,anton-dessiatov/ghc,AlexanderPankiv/ghc,wxwxwwxxx/ghc,mcschroeder/ghc,nathyong/microghc-ghc,nushio3/ghc,ezyang/ghc,frantisekfarka/ghc-dsi,olsner/ghc,nushio3/ghc,green-haskell/ghc,olsner/ghc,lukexi/ghc,jstolarek/ghc,ryantm/ghc,oldmanmike/ghc,mettekou/ghc,nkaretnikov/ghc,ezyang/ghc,ilyasergey/GHC-XAppFix,christiaanb/ghc,TomMD/ghc,vTurbine/ghc,mettekou/ghc,snoyberg/ghc,wxwxwwxxx/ghc,lukexi/ghc-7.8-arm64