GZipStream error

[schovan]

code:

using (var gZipStream = new GZipStream(fileStream, CompressionMode.Decompress))
				{
					return (CodebookDatabase)dataContractSerializer.ReadObject(gZipStream);
				}

error:

System.DllNotFoundException: MonoPosixHelper at (wrapper managed-to-native) System.IO.Compression.DeflateStreamNative.CreateZStream(System.IO.Compression.CompressionMode,bool,System.IO.Compression.DeflateStreamNative/UnmanagedReadOrWrite,intptr) at System.IO.Compression.DeflateStreamNative.Create (System.IO.Stream compressedStream, System.IO.Compression.CompressionMode mode, System.Boolean gzip) <0x2740038 + 0x00080> in <c2e9496db6ba466098b20331dcc12656>:0 at System.IO.Compression.DeflateStream..ctor (System.IO.Stream compressedStream, System.IO.Compression.CompressionMode mode, System.Boolean leaveOpen, System.Boolean gzip) <0x273f980 + 0x00066> in <c2e9496db6ba466098b20331dcc12656>:0 at System.IO.Compression.DeflateStream..ctor (System.IO.Stream stream, System.IO.Compression.CompressionMode mode, System.Boolean leaveOpen, System.Int32 windowsBits) <0x273f868 + 0x00026> in <c2e9496db6ba466098b20331dcc12656>:0 at System.IO.Compression.GZipStream..ctor (System.IO.Stream stream, System.IO.Compression.CompressionMode mode, System.Boolean leaveOpen) <0x27316b8 + 0x0002c> in <c2e9496db6ba466098b20331dcc12656>:0 at System.IO.Compression.GZipStream..ctor (System.IO.Stream stream, System.IO.Compression.CompressionMode mode) <0x27314c8 + 0x0001a> in <c2e9496db6ba466098b20331dcc12656>:0 at KiwiBlazor.Data.CodebookDatabaseRepository.Read () <0x2730818 + 0x00044> in <6898c563fe1d4c2aaf0e085be30b1630>:0 at App1.Business.Internal.Cube.CubeBase.Create (App1.Business.Data.CalculatorSettings calculatorSettings, System.Threading.CancellationToken cancellationToken, System.IProgress1[T] progress) <0x27300c0 + 0x0005e> in :0 at App1.Business.Services.Calculator.CalculateInner (App1.Business.Data.CalculatorSettings calculatorSettings, System.Threading.CancellationToken cancellationToken, System.IProgress1[T] progress) <0x272fe60 + 0x00052> in <f134c8506d75462f8da392d8c612d630>:0 at App1.Business.Services.Calculator+<>c__DisplayClass3_0.<Calculate>b__0 () <0x272fb98 + 0x00026> in <f134c8506d75462f8da392d8c612d630>:0 at (wrapper delegate-invoke) System.Func1[App1.Business.Data.CalculatorResults].invoke_TResult() at System.Threading.Tasks.Task1[TResult].InnerInvoke () <0x272f960 + 0x00026> in <6eede25ff44941f1aaa5c565f8d0750d>:0 at System.Threading.Tasks.Task.Execute () <0x2733628 + 0x0000e> in <6eede25ff44941f1aaa5c565f8d0750d>:0 --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Threading.Tasks.Task task) <0x274e430 + 0x00082> in <6eede25ff44941f1aaa5c565f8d0750d>:0 at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) <0x274dc38 + 0x00066> in <6eede25ff44941f1aaa5c565f8d0750d>:0 at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) <0x25fa7e8 + 0x00018> in <6eede25ff44941f1aaa5c565f8d0750d>:0 at System.Runtime.CompilerServices.TaskAwaiter1[TResult].GetResult () <0x274d9f8 + 0x0000c> in <6eede25ff44941f1aaa5c565f8d0750d>:0 at App1.Business.Services.Calculator+d__3.MoveNext () <0x272c018 + 0x00146> in :0 --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Threading.Tasks.Task task) <0x274e430 + 0x00082> in <6eede25ff44941f1aaa5c565f8d0750d>:0 at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) <0x274dc38 + 0x00066> in <6eede25ff44941f1aaa5c565f8d0750d>:0 at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) <0x25fa7e8 + 0x00018> in <6eede25ff44941f1aaa5c565f8d0750d>:0 at System.Runtime.CompilerServices.TaskAwaiter1[TResult].GetResult () <0x274d9f8 + 0x0000c> in <6eede25ff44941f1aaa5c565f8d0750d>:0 at KiwiBlazor.AppViewModel+<ComputeAnalysisNoServer>d__74.MoveNext () <0x271bb58 + 0x00314> in <6898c563fe1d4c2aaf0e085be30b1630>:0 --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Threading.Tasks.Task task) <0x274e430 + 0x00082> in <6eede25ff44941f1aaa5c565f8d0750d>:0 at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) <0x274dc38 + 0x00066> in <6eede25ff44941f1aaa5c565f8d0750d>:0 at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) <0x25fa7e8 + 0x00018> in <6eede25ff44941f1aaa5c565f8d0750d>:0 at System.Runtime.CompilerServices.TaskAwaiter.GetResult () <0x26cadc0 + 0x0000c> in <6eede25ff44941f1aaa5c565f8d0750d>:0 at KiwiBlazor.AppViewModel+<ComputeAnalysis>d__72.MoveNext () <0x1d38ad0 + 0x0028e> in <6898c563fe1d4c2aaf0e085be30b1630>:0

[SteveSandersonMS]

@kumpera, do you know whether this should be expected to work? I see that others have reported this about Mono for Windows in general (example). Should the MonoPosixHelper be included in Mono for WebAssembly?

[kumpera]

MonoPosixHelper won't be provided with mono and WebAssembly.
It's not entirely clear to me why we're trying to use it, TBH. On iOS we don't have it and yet that assembly works. cc @marek-safar

[kumpera]

As it turns out, this is handled differently on iOS, will adopt that implementation.

[SteveSandersonMS]

Hopefully this has been fixed in a newer version of Mono.

@schovan If it hasn't yet been fixed in the latest Mono drop (e.g., if you try it on Blazor 0.5.0 and it still doesn't work), could you report this to http://github.com/mono/mono?

Closing as external.