Unable to retrieve package version for ... #3419

  -> Unable to retrieve package versions for 'Fake.Runtime'
     -- CLOSED --
        
     -- OPEN ----
        Fake.Runtime  (from /home/travis/build/fsharp/FAKE/integrationtests/core-simple-runtime-error/temp/.fake/runtime-error.fsx/paket.dependencies)
        FSharp.Core  (from /home/travis/build/fsharp/FAKE/integrationtests/core-simple-runtime-error/temp/.fake/runtime-error.fsx/paket.dependencies)
     StackTrace:
          at Paket.PackageResolver.getVersionsBlock@1057-1.GenerateNext(IEnumerable`1& next)
          at Microsoft.FSharp.Core.CompilerServices.GeneratedSequenceBase`1.MoveNextImpl()
          at Microsoft.FSharp.Collections.SeqModule.oneStepTo@979[T](IEnumerable`1 source, List`1 prefix, FSharpRef`1 enumeratorR, Int32 i)
          at Microsoft.FSharp.Collections.SeqModule.action@4251-1[T](IEnumerable`1 source, List`1 prefix, FSharpRef`1 enumeratorR, Int32 i, Unit unitVar0)
          at Microsoft.FSharp.Collections.SeqModule.result@995.Invoke(Int32 i)
          at Microsoft.FSharp.Collections.Internal.IEnumerator.unfold@199.DoMoveNext(b& curr)
          at Microsoft.FSharp.Collections.Internal.IEnumerator.MapEnumerator`1.System-Collections-IEnumerator-MoveNext()
          at Microsoft.FSharp.Collections.Internal.IEnumerator.map@74.DoMoveNext(b& curr)
          at Microsoft.FSharp.Collections.Internal.IEnumerator.MapEnumerator`1.System-Collections-IEnumerator-MoveNext()
          at Microsoft.FSharp.Collections.Internal.IEnumerator.next@187[T](FSharpFunc`2 f, IEnumerator`1 e, FSharpRef`1 started, Unit unitVar0)
          at Microsoft.FSharp.Collections.SeqModule.oneStepTo@979[T](IEnumerable`1 source, List`1 prefix, FSharpRef`1 enumeratorR, Int32 i)
          at Microsoft.FSharp.Collections.SeqModule.action@4251-1[T](IEnumerable`1 source, List`1 prefix, FSharpRef`1 enumeratorR, Int32 i, Unit unitVar0)
          at Microsoft.FSharp.Collections.SeqModule.result@995.Invoke(Int32 i)
          at Microsoft.FSharp.Collections.Internal.IEnumerator.unfold@199.DoMoveNext(b& curr)
          at Microsoft.FSharp.Collections.Internal.IEnumerator.MapEnumerator`1.System-Collections-IEnumerator-MoveNext()
          at Microsoft.FSharp.Collections.SeqModule.IsEmpty[T](IEnumerable`1 source)
          at Paket.PackageResolver.getCompatibleVersions(ResolverStep currentStep, GroupName groupName, PackageRequirement currentRequirement, IDictionary`2 rootDependencies, FSharpFunc`2 getVersionsF, Boolean globalOverride, FSharpOption`1 globalStrategyForDirectDependencies, FSharpOption`1 globalStrategyForTransitives)
          at Paket.PackageResolver.step@1113(UpdateMode updateMode, GroupName groupName, FSharpOption`1 globalStrategyForTransitives, FSharpOption`1 globalStrategyForDirectDependencies, FrameworkRestrictions globalFrameworkRestrictions, FSharpFunc`2 getVersionsRaw, FSharpFunc`2 getPreferredVersionsRaw, FSharpFunc`2 getPackageDetailsRaw, FSharpSet`1 cliToolSettings, ResolverRequestQueue workerQueue, Int32 taskTimeout, TimeSpan loopTimeout, ConcurrentDictionary`2 startedGetPackageDetailsRequests, FSharpFunc`2 getPackageDetailsBlock, ConcurrentDictionary`2 startedGetVersionsRequests, FSharpOption`1 packageFilter, IDictionary`2 rootDependenciesDict, FSharpSet`1 lockedPackages, DateTime loopTime, Stage stage, StackPack stackpack, IEnumerable`1 compatibleVersions, StepFlags flags)
          at Paket.PackageResolver.Resolve(FSharpFunc`2 getVersionsRaw, FSharpFunc`2 getPreferredVersionsRaw, FSharpFunc`2 getPackageDetailsRaw, GroupName groupName, FSharpOption`1 globalStrategyForDirectDependencies, FSharpOption`1 globalStrategyForTransitives, FrameworkRestrictions globalFrameworkRestrictions, FSharpSet`1 rootDependencies, UpdateMode updateMode)
          at <StartupCode$Paket-Core>.$DependenciesFile.resolveGroup@222-1.Invoke(GroupName groupName, b _arg1)
          at Microsoft.FSharp.Collections.MapTreeModule.mapiOpt[a,b,c](FSharpFunc`3 f, MapTree`2 m)
          at Microsoft.FSharp.Collections.FSharpMap`2.Map[b](FSharpFunc`2 f)
          at Paket.UpdateProcess.selectiveUpdate(Boolean force, FSharpFunc`2 getSha1, FSharpFunc`2 getVersionsF, FSharpFunc`2 getPackageDetailsF, FSharpFunc`2 getRuntimeGraphFromPackage, LockFile lockFile, DependenciesFile dependenciesFile, UpdateMode updateMode, SemVerUpdateMode semVerUpdateMode)
          at Paket.UpdateProcess.SelectiveUpdate(DependenciesFile dependenciesFile, FSharpOption`1 alternativeProjectRoot, UpdateMode updateMode, SemVerUpdateMode semVerUpdateMode, Boolean force)
          at Paket.UpdateProcess.SmartInstall(DependenciesFile dependenciesFile, UpdateMode updateMode, UpdaterOptions options)
          at Paket.UpdateProcess.UpdateGroup(String dependenciesFileName, GroupName groupName, UpdaterOptions options)
          at <StartupCode$Paket-Core>.$PublicAPI.UpdateGroup@335-3.Invoke(Unit unitVar0)
          at Paket.Utils.RunInLockedAccessMode[a](String lockedFolder, FSharpFunc`2 action)
          at Fake.Runtime.FakeRuntime.restoreOrUpdate@216(FakeConfig config, String cacheDir, Dependencies paketApi, FSharpOption`1 group, VerboseLevel logLevel, String script, String groupStr, FileInfo lockFilePath, Unit unitVar0) in /home/travis/build/fsharp/FAKE/src/app/Fake.Runtime/FakeRuntime.fs:line 217
          at Fake.Runtime.FakeRuntime.paketCachingProvider(FakeConfig config, String cacheDir, Dependencies paketApi, Lazy`1 paketDependenciesFile, FSharpOption`1 group) in /home/travis/build/fsharp/FAKE/src/app/Fake.Runtime/FakeRuntime.fs:line 298
          at Fake.Runtime.FakeRuntime.prepareFakeScript(FakeConfig config) in /home/travis/build/fsharp/FAKE/src/app/Fake.Runtime/FakeRuntime.fs:line 449
          at Program.runOrBuild(RunArguments args) in /home/travis/build/fsharp/FAKE/src/app/Fake.netcore/Program.fs:line 155
  -> OperationCanceledException: The operation was canceled.
     StackTrace:
          at Paket.NetUtils._safeGetFromUrl@576-9.Invoke(Exception _arg5)
          at <StartupCode$FSharp-Core>.$Async.TryWith@1113-1.Invoke(Exception exn)
          at Microsoft.FSharp.Control.AsyncPrimitives.CallFilterThenInvoke[T](AsyncActivation`1 ctxt, FSharpFunc`2 catchFilter, ExceptionDispatchInfo edi)
          at Microsoft.FSharp.Control.Trampoline.Execute(FSharpFunc`2 firstAction)
       --- End of stack trace from previous location where exception was thrown ---
          at Paket.PackageResolver.getAndReport@994[a](Int32 taskTimeout, FSharpList`1 sources, BlockReason blockReason, ResolverTaskMemory`1 mem)
          at Paket.PackageResolver.getVersionsBlock@1057-1.GenerateNext(IEnumerable`1& next)