diff --git a/build.gradle b/build.gradle
index 92c30ff52a..2acd0cc068 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,6 +1,6 @@
 buildscript {
     ext.kotlin_version = '1.0.3'
-    ext.quasar_version = '0.7.5'
+    ext.quasar_version = '0.7.6'
     ext.asm_version = '0.5.3'
     ext.artemis_version = '1.3.0'
     ext.jackson_version = '2.8.0.rc2'
diff --git a/lib/quasar.jar b/lib/quasar.jar
index 2734f0a68a..286f065e43 100644
Binary files a/lib/quasar.jar and b/lib/quasar.jar differ
diff --git a/node/src/main/kotlin/com/r3corda/node/services/statemachine/StateMachineManager.kt b/node/src/main/kotlin/com/r3corda/node/services/statemachine/StateMachineManager.kt
index e6b247d4d9..697ca6f638 100644
--- a/node/src/main/kotlin/com/r3corda/node/services/statemachine/StateMachineManager.kt
+++ b/node/src/main/kotlin/com/r3corda/node/services/statemachine/StateMachineManager.kt
@@ -215,8 +215,8 @@ class StateMachineManager(val serviceHub: ServiceHubInternal, tokenizableService
      * restarted with checkpointed state machines in the storage service.
      */
     fun <T> add(loggerName: String, logic: ProtocolLogic<T>): ListenableFuture<T> {
+        val fiber = ProtocolStateMachineImpl(logic, scheduler, loggerName)
         try {
-            val fiber = ProtocolStateMachineImpl(logic, scheduler, loggerName)
             // Need to add before iterating in case of immediate completion
             initFiber(fiber) {
                 val checkpoint = Checkpoint(serializeFiber(fiber), null)
@@ -229,11 +229,12 @@ class StateMachineManager(val serviceHub: ServiceHubInternal, tokenizableService
                 }
                 totalStartedProtocols.inc()
             }
-            return fiber.resultFuture
         } catch (e: Throwable) {
+            // TODO: We should be able to remove this as we get more confident that we never fail to log exceptions.
             e.printStackTrace()
-            throw e
+            check(fiber.resultFuture.isDone)
         }
+        return fiber.resultFuture
     }
 
     private fun updateCheckpoint(psm: ProtocolStateMachineImpl<*>,
diff --git a/node/src/test/kotlin/com/r3corda/node/services/persistence/DataVendingServiceTests.kt b/node/src/test/kotlin/com/r3corda/node/services/persistence/DataVendingServiceTests.kt
index 44db3c9097..66a09a4b3b 100644
--- a/node/src/test/kotlin/com/r3corda/node/services/persistence/DataVendingServiceTests.kt
+++ b/node/src/test/kotlin/com/r3corda/node/services/persistence/DataVendingServiceTests.kt
@@ -7,13 +7,13 @@ import com.r3corda.core.contracts.TransactionType
 import com.r3corda.core.contracts.USD
 import com.r3corda.core.testing.DUMMY_NOTARY
 import com.r3corda.core.testing.MEGA_CORP
+import com.r3corda.core.testing.rootCauseExceptions
 import com.r3corda.node.internal.testing.MockNetwork
 import org.junit.Before
 import org.junit.Test
 import java.util.concurrent.TimeUnit
 import kotlin.test.assertEquals
 import kotlin.test.assertFailsWith
-import kotlin.test.assertTrue
 
 /**
  * Tests for the data vending service.
@@ -76,10 +76,11 @@ class DataVendingServiceTests {
         val notifyPsm = DataVending.Service.notify(registerNode.net, registerNode.services.storageService.myLegalIdentity,
                 walletServiceNode.info, tx)
 
-        // Check it was accepted
+        // Check it was not accepted
         network.runNetwork()
-        val ex = assertFailsWith<java.util.concurrent.ExecutionException> { notifyPsm.get(1, TimeUnit.SECONDS) }
-        assertTrue(ex.cause is DataVending.Service.TransactionRejectedError)
+        assertFailsWith<DataVending.Service.TransactionRejectedError> {
+            rootCauseExceptions { notifyPsm.get() }
+        }
 
         // Check the transaction is not in the receiving node
         assertEquals(0, walletServiceNode.services.walletService.currentWallet.states.toList().size)