Concurrency test failure

gistfile1.txt

[info] InMemoryStoreConcurrencyTests:                                                                                                                                                                       
[info] CORE-589 produce and consume in a multithreaded fashion                                                                                                                                              
[info] - should show high performance *** FAILED ***                                                                                                                                                        
[info]   java.lang.Exception: java.util.NoSuchElementException: None.get                                                                                                                                    
[info]   at coop.rchain.rspace.ConcurrencyTests.$anonfun$$init$$2(ConcurrencyTests.scala:78)                                                                                                                
[info]   at coop.rchain.rspace.ConcurrencyTests.$anonfun$$init$$2$adapted(ConcurrencyTests.scala:18)                                                                                                        
[info]   at coop.rchain.rspace.InMemoryStoreStorageExamplesTestsBase.withTestSpace(StorageExamplesTests.scala:285)                                                                                          
[info]   at coop.rchain.rspace.ConcurrencyTests.$anonfun$$init$$1(ConcurrencyTests.scala:18)                                                                                                                
[info]   at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:12)                                                                                                                          
[info]   at org.scalatest.OutcomeOf.outcomeOf(OutcomeOf.scala:85)                                                                                       
[info]   at org.scalatest.OutcomeOf.outcomeOf$(OutcomeOf.scala:83)                                                                                      
[info]   at org.scalatest.OutcomeOf$.outcomeOf(OutcomeOf.scala:104)                                                                                     
[info]   at org.scalatest.Transformer.apply(Transformer.scala:22)                                                                                       
[info]   at org.scalatest.Transformer.apply(Transformer.scala:20)                                                                                       
[info]   ...                                                                                                                                            
[info]   Cause: java.util.NoSuchElementException: None.get                                                                                              
[info]   at scala.None$.get(Option.scala:349)                                                                                                           
[info]   at scala.None$.get(Option.scala:347)                                                                                                           
[info]   at scala.concurrent.SyncVar.take(SyncVar.scala:86)                                                                                                           
[info]   at coop.rchain.rspace.test.InMemoryStore$$anon$2.<init>(InMemoryStore.scala:85)                                                                              
[info]   at coop.rchain.rspace.test.InMemoryStore.createTxnWrite(InMemoryStore.scala:82)                                                                              
[info]   at coop.rchain.rspace.test.InMemoryStore.createTxnWrite(InMemoryStore.scala:40)                                                                              
[info]   at coop.rchain.rspace.RSpace.$anonfun$consume$1(RSpace.scala:85)                                                                                             
[info]   at coop.rchain.rspace.StoreEventsCounter.register(StoreEventsCounter.scala:168)                                                                              
[info]   at coop.rchain.rspace.StoreEventsCounter.registerConsume(StoreEventsCounter.scala:126)                                                                       
[info]   at coop.rchain.rspace.RSpace.consume(RSpace.scala:79)                                                                                                        
[info]   ...