Don't refer to oc->next after freeing oc.
Don't refer to oc->next after freeing oc.

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