'System.NotSupportedException' in System.Private.CoreLib.dll

[aecceyhan]

ImageSharp version

SixLabors.ImageSharp 2.0.0

Other ImageSharp packages and versions

SixLabors.ImageSharp 2.0.0

Environment (Operating system, version and so on)

macOS Monterey M1

.NET Framework version

net5.0

Description

When I try to save an image on stream I get "'System.NotSupportedException' in System.Private.CoreLib.dll" exception.

Steps to Reproduce

 public static Stream GetReducedImage(int width, int height, Stream resourceImage)
        {
            IImageFormat format;
            using (Image image = Image.Load(resourceImage, out format))
            {
                image.Mutate(x => x.Resize(width, height));
                image.Save(resourceImage, format);
                return resourceImage;
            }
}

Images

No response

[tocsoft]

@aecceyhan any chance you can provide a stack trace?

[aecceyhan]

@tocsoft

I add this to get stack trace:

try
                {
                    image.Save(resourceImage, format);
                }
                catch
                {
                    Console.WriteLine(
                        new System.Diagnostics.StackTrace().ToString()
                        );
                }

 at ImageResizer.Worker.GetReducedImage(Int32 width, Int32 height, Stream resourceImage)
   at ImageResizer.Worker.ImageResizer(ImageUploadEvent event)
   at System.Runtime.CompilerServices.AsyncMethodBuilderCore.Start[TStateMachine](TStateMachine& stateMachine)
   at ImageResizer.Worker.ImageResizer(ImageUploadEvent event)
   at ImageResizer.Worker.ExecuteAsync(CancellationToken stoppingToken)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1.ExecutionContextCallback(Object s)
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1.MoveNext(Thread threadPoolThread)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1.MoveNext()
   at System.Threading.Tasks.AwaitTaskContinuation.RunOrScheduleAction(IAsyncStateMachineBox box, Boolean allowInlining)
   at System.Threading.Tasks.Task.RunContinuations(Object continuationObject)
   at System.Threading.Tasks.Task.FinishContinuations()
   at System.Threading.Tasks.Task.TrySetResult()
   at System.Threading.Tasks.Task.DelayPromise.CompleteTimedOut()
   at System.Threading.Tasks.Task.DelayPromise.<>c.<.ctor>b__1_0(Object state)
   at System.Threading.TimerQueueTimer.CallCallback(Boolean isThreadPool)
   at System.Threading.TimerQueueTimer.Fire(Boolean isThreadPool)
   at System.Threading.TimerQueue.FireNextTimers()
   at System.Threading.TimerQueue.AppDomainTimerCallback(Int32 id)

[JimBobSquarePants]

Does it work with .NET 6?

I’m curious to see if it has anything to do with the difference in M1 support between the two framework versions.

[tocsoft]

~Whats ImageResizer? is this your code or a third party library?~

Scratch that, its obviously your code as your sample above it the final method.

[JimBobSquarePants]

Why does the stacktrace originate there though? There’s no reference to ImageSharp in the trace.

[tocsoft]

Run the below code instead to get the stack trace of the error not the stack trace of the the catch.

try
{
    image.Save(resourceImage, format);
}
catch(Exception ex)
{
    Console.WriteLine(ex.StackTrace);
}

[aecceyhan]

@tocsoft

at System.IO.MemoryStream.set_Capacity(Int32 value)
   at System.IO.MemoryStream.EnsureCapacity(Int32 value)
   at System.IO.MemoryStream.Write(ReadOnlySpan`1 buffer)
   at SixLabors.ImageSharp.Formats.Png.PngEncoderCore.Encode[TPixel](Image`1 image, Stream stream, CancellationToken cancellationToken)
   at SixLabors.ImageSharp.Formats.ImageEncoderUtilities.Encode[TPixel](IImageEncoderInternals encoder, Image`1 image, Stream stream)
   at SixLabors.ImageSharp.Formats.Png.PngEncoder.Encode[TPixel](Image`1 image, Stream stream)
   at SixLabors.ImageSharp.Image.EncodeVisitor.Visit[TPixel](Image`1 image)
   at SixLabors.ImageSharp.Image`1.Accept(IImageVisitor visitor)
   at SixLabors.ImageSharp.Advanced.AdvancedImageExtensions.AcceptVisitor(Image source, IImageVisitor visitor)
   at SixLabors.ImageSharp.Image.Save(Stream stream, IImageEncoder encoder)
   at SixLabors.ImageSharp.ImageExtensions.Save(Image source, Stream stream, IImageFormat format)
   at ImageResizer.Worker.GetReducedImage(Int32 width, Int32 height, Stream resourceImage) in [/Users/aec/Documents/Centrum/ImageResizer/Worker.cs]():line 156

[JimBobSquarePants]

That stacktrace originates in MemoryStream.Capacity and not in ImageSharp.

A NotSupportedException is thrown there when the MemoryStream has either been:

• Disposed
• Constructed with a fixed size buffer.

[aecceyhan]

Thanks, @JimBobSquarePants

Do you have any recommendations?

[tocsoft]

basically it looks like there is an issue in your code with how you are handling/creating the resourceImage stream you want to look to make sure you are not creating the MemoryStream with a capacity or with a fixed buffer i.e. create the stream with new MemoryStream() rather than new MemoryStream(new byte [0]) or new MemoryStream(0) etc.

Or you not calling stream.Dispose() either directly or indirectly via a using block/expression.

Ultimately it look like you have some dodgy code elsewhere in your application and there is no issue with ImageSharp.