Make ioManagerDie() idempotent Avoids screeds of "event buffer overflowed; event dropped" in conc059(threaded1).
Make ioManagerDie() idempotent
Avoids screeds of "event buffer overflowed; event dropped" in
conc059(threaded1).

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