Bug with double Dispose?

[gfoidl]

In a CI run an exception is thrown:

System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation.
 ---> System.NullReferenceException: Object reference not set to an instance of an object.
   at gfoidl.DataCompression.Internal.DeadBand.SequentialEnumerableIterator.DisposeCore() in /_/source/gfoidl.DataCompression/Compression/DeadBandCompression/SequentialEnumerableIterator.cs:line 39
   at gfoidl.DataCompression.DataPointIterator.Dispose() in /_/source/gfoidl.DataCompression/DataPointIterator.cs:line 179
   at gfoidl.DataCompression.Benchmarks.DeadBandCompression.Enumerate() in /home/vsts/work/1/s/perf/gfoidl.DataCompression.Benchmarks/DeadBandCompression.cs:line 16
   at BenchmarkDotNet.Autogenerated.Runnable_0.WorkloadActionNoUnroll(Int64 invokeCount) in /home/vsts/work/1/s/perf/gfoidl.DataCompression.Benchmarks/bin/Release/net6.0/289e03e1-c8a9-4275-afa1-ff9acba27b91/289e03e1-c8a9-4275-afa1-ff9acba27b91.notcs:line 495
   at BenchmarkDotNet.Engines.Engine.RunIteration(IterationData data)
   at BenchmarkDotNet.Engines.EngineFactory.Jit(Engine engine, Int32 jitIndex, Int32 invokeCount, Int32 unrollFactor)
   at BenchmarkDotNet.Engines.EngineFactory.CreateReadyToRun(EngineParameters engineParameters)
   at BenchmarkDotNet.Autogenerated.Runnable_0.Run(IHost host, String benchmarkName) in /home/vsts/work/1/s/perf/gfoidl.DataCompression.Benchmarks/bin/Release/net6.0/289e03e1-c8a9-4275-afa1-ff9acba27b91/289e03e1-c8a9-4275-afa1-ff9acba27b91.notcs:line 172
   --- End of inner exception stack trace ---

Looks like the double Dispose from

DataCompression/perf/gfoidl.DataCompression.Benchmarks/DeadBandCompression.cs

Lines 15 to 16 in c0683f4

	using DataPointIterator filtered = source.DeadBandCompression(0.1);
	return Consume(filtered);

and the foreach from Consume is the culprit.