Fail nicely when encountering an invalid bang annotation (#7210)
Fail nicely when encountering an invalid bang annotation (#7210)

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