Fix the deugger (fixing Trac #8557)
Fix the deugger (fixing Trac #8557)

The runtime debugger (which has not received any love from anyone
for many years) looks wrong to me; it was failing to instantiate the
outer foralls of a variable when called from :force, which calls
cvObtainTermFromId, which calls cvObtainTerm

I simplified the code too.  But I'm flaky on how this debugger stuff
is really supposed to work, so I'm partly guessing.  Tests pass though.

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