Make .obs/.obsvar/.sorryobs/.worryobs work better
Make .obs/.obsvar/.sorryobs/.worryobs work better

Before they were apparently returning 1 if they didn't throw, which caused
the NQP regex engine to go berserk.

Fixes R#2556.

labster/rakudo,labster/rakudo,rakudo/rakudo,rakudo/rakudo,rakudo/rakudo,Gnouc/rakudo,nbrown/rakudo,Gnouc/rakudo,tony-o/rakudo,rakudo/rakudo,tbrowder/rakudo,tbrowder/rakudo,tbrowder/rakudo,nbrown/rakudo,salortiz/rakudo,salortiz/rakudo,tbrowder/rakudo,salortiz/rakudo,Gnouc/rakudo,tony-o/rakudo,softmoth/rakudo,nbrown/rakudo,MasterDuke17/rakudo,salortiz/rakudo,tony-o/rakudo,MasterDuke17/rakudo,nbrown/rakudo,rakudo/rakudo,Gnouc/rakudo,softmoth/rakudo,softmoth/rakudo,labster/rakudo,nbrown/rakudo,labster/rakudo,nbrown/rakudo,softmoth/rakudo,MasterDuke17/rakudo,tbrowder/rakudo,rakudo/rakudo,labster/rakudo,Gnouc/rakudo,tony-o/rakudo,tbrowder/rakudo,MasterDuke17/rakudo,tony-o/rakudo,MasterDuke17/rakudo,Gnouc/rakudo,salortiz/rakudo,salortiz/rakudo,tony-o/rakudo,labster/rakudo,MasterDuke17/rakudo,softmoth/rakudo