Added recoverable option

ethvm/vm.go

@@ -37,6 +37,8 @@ type Vm struct {
 	BreakPoints []int64
 	Stepping    bool
 	Fn          string
+
+	Recoverable bool
 }
 
 type Environment interface {
@@ -62,10 +64,11 @@ func New(env Environment) *Vm {
 		lt = LogTyDiff
 	}
 
-	return &Vm{env: env, logTy: lt}
+	return &Vm{env: env, logTy: lt, Recoverable: true}
 }
 
 func (self *Vm) RunClosure(closure *Closure) (ret []byte, err error) {
+	if self.Recoverable {
 		// Recover from any require exception
 		defer func() {
 			if r := recover(); r != nil {
@@ -74,6 +77,7 @@ func (self *Vm) RunClosure(closure *Closure) (ret []byte, err error) {
 				vmlogger.Errorln("vm err", err)
 			}
 		}()
+	}
 
 	// Debug hook
 	if self.Dbg != nil {