diff --git a/vm/vm_debug.go b/vm/vm_debug.go
index 8773df087a655075e20d1253f2cadf8e9047f17c..acdeb4be94acd0e5ba5350cf095c67673cd1429f 100644
--- a/vm/vm_debug.go
+++ b/vm/vm_debug.go
@@ -82,7 +82,8 @@ func (self *DebugVm) RunClosure(closure *Closure) (ret []byte, err error) {
 				self.Endl()
 
 				ret = closure.Return(nil)
-				err = fmt.Errorf("%v", r)
+				// No error should be set. Recover is used with require
+				// Is this too error prone?
 			}
 		}()
 	}
@@ -106,7 +107,7 @@ func (self *DebugVm) RunClosure(closure *Closure) (ret []byte, err error) {
 
 		step++
 		// Get the memory location of pc
-		op := OpCode(closure.Get(pc).Uint())
+		op = OpCode(closure.Get(pc).Uint())
 
 		// XXX Leave this Println intact. Don't change this to the log system.
 		// Used for creating diffs between implementations