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Getting System.ArgumentException after upgrade from 20180304114938 version

See original GitHub issue

Hi. Getting this error after upgrading to latest version. Tried to upgrade a week ago it was same. 20180304114938 version works fine.

Unhandled Exception: System.ArgumentException: An item with the same key has already been added. Key: 221395250
   at System.ThrowHelper.ThrowAddingDuplicateWithKeyArgumentException(Object key)
   at System.Collections.Generic.Dictionary`2.TryInsert(TKey key, TValue value, InsertionBehavior behavior)
   at MiniCover.HitServices.HitTestMethod.Read(BinaryReader binaryReader)
   at MiniCover.HitServices.HitTestMethod.Deserialize(Stream stream)
   at MiniCover.Hits.TryReadFromFile(String file)
   at MiniCover.Reports.OpenCoverReport.Execute(InstrumentationResult result, String output, Single threshold)
   at MiniCover.Program.<>c__DisplayClass0_6.<Main>b__13()
   at Microsoft.Extensions.CommandLineUtils.CommandLineApplication.Execute(String[] args)
   at MiniCover.Program.Main(String[] args)