[Downlevel] ZLibException on web listener

[victorhurdugaci]

This is bug when running on CoreCLR Win7/2008R2.

1. Run MusicStore or any app that uses identity on weblistener
2. Try to login

You get the following exception

System.IO.Compression.ZLibException: The underlying compression routine could not be loaded correctly. ---> System.DllNotFoundException: Unable to load DLL 'clrcompression.dll': The specified module could not be found. (Exception from HRESULT: 0x8007007E)
   at Interop.deflateInit2_(Byte* stream, Int32 level, Int32 method, Int32 windowBits, Int32 memLevel, Int32 strategy, Byte* version, Int32 stream_size)
   at Interop.DeflateInit2_(ZStream& stream, CompressionLevel level, CompressionMethod method, Int32 windowBits, Int32 memLevel, CompressionStrategy strategy, Byte[] version)
   at System.IO.Compression.ZLibNative.ZLibStreamHandle.DeflateInit2_(CompressionLevel level, Int32 windowBits, Int32 memLevel, CompressionStrategy strategy)
   at System.IO.Compression.ZLibNative.CreateZLibStreamForDeflate(ZLibStreamHandle& zLibStreamHandle, CompressionLevel level, Int32 windowBits, Int32 memLevel, CompressionStrategy strategy)
   at System.IO.Compression.DeflaterZLib.DeflateInit(CompressionLevel compressionLevel, Int32 windowBits, Int32 memLevel, CompressionStrategy strategy)
   --- End of inner exception stack trace ---
   at System.IO.Compression.DeflaterZLib.DeflateInit(CompressionLevel compressionLevel, Int32 windowBits, Int32 memLevel, CompressionStrategy strategy)
   at System.IO.Compression.DeflaterZLib..ctor(CompressionLevel compressionLevel)
   at System.IO.Compression.DeflateStream.CreateDeflater(Nullable`1 compressionLevel)
   at System.IO.Compression.DeflateStream..ctor(Stream stream, CompressionLevel compressionLevel, Boolean leaveOpen)
   at System.IO.Compression.GZipStream..ctor(Stream stream, CompressionLevel compressionLevel, Boolean leaveOpen)
   at System.IO.Compression.GZipStream..ctor(Stream stream, CompressionLevel compressionLevel)
   at Microsoft.AspNet.Security.DataHandler.Serializer.TicketSerializer.Serialize(AuthenticationTicket model)
   at Microsoft.AspNet.Security.DataHandler.SecureDataFormat`1.Protect(TData data)
   at Microsoft.AspNet.Security.Cookies.CookieAuthenticationHandler.<ApplyResponseGrantAsync>d__1.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.AspNet.Security.Infrastructure.AuthenticationHandler.<ApplyResponseCoreAsync>d__1.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.AspNet.Security.Infrastructure.AuthenticationHandler.ApplyResponse()
   at Microsoft.Net.Http.Server.Response.NotifyOnSendingHeaders()

[victorhurdugaci]

This bug can be simply reproduced by running this code on CoreCLR on Win7:

using (var memory = new MemoryStream())
{
    GZipStream compression;
    compression = new GZipStream(memory, CompressionLevel.Optimal);
}

[davidfowl]

@victorhurdugaci closing this out as resolved