isCancelled assertion

gistfile1.txt

diff --git a/src/GWallet.Backend/FaultTolerantParallelClient.fs b/src/GWallet.Backend/FaultTolerantParallelClient.fs
index 32bbe9b..3769a05 100644
--- a/src/GWallet.Backend/FaultTolerantParallelClient.fs
+++ b/src/GWallet.Backend/FaultTolerantParallelClient.fs
@@ -150,6 +150,8 @@ type FaultTolerantParallelClient<'K,'E when 'K: equality and 'E :> Exception>(up
 
             let taskToWaitForFirstFinishedTask = Task.WhenAny theTasks
             let! fastestTask = Async.AwaitTask taskToWaitForFirstFinishedTask
+            if fastestTask.IsCanceled then
+                return failwith "it's canceled, shit"
             let failuresOfTask,resultOfTask = fastestTask.Result
 
             let restOfTasks: List<Task<NonParallelResults<'K,'R,'E>>> =