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context.BackgroundColor throws Object reference not set to an instance of an object. #1230
Description
Prerequisites
- I have written a descriptive issue title
- I have verified that I am running the latest version of ImageSharp
- I have verified if the problem exist in both
DEBUGandRELEASEmode - I have searched open and closed issues to ensure it has not already been reported
Description
Object reference not set to an instance of an object.
at System.Collections.Generic.Dictionary`2.TryInsert(TKey key, TValue value, InsertionBehavior behavior)
at System.Collections.Generic.Dictionary`2.set_Item(TKey key, TValue value)
at SixLabors.ImageSharp.GraphicOptionsDefaultsExtensions.GetGraphicsOptions(Configuration configuration)
at SixLabors.ImageSharp.GraphicOptionsDefaultsExtensions.GetGraphicsOptions(IImageProcessingContext context)
at SixLabors.ImageSharp.Processing.BackgroundColorExtensions.BackgroundColor(IImageProcessingContext source, Color color)
at Dropmaker.Program.<RunOnce>b__12_0(IImageProcessingContext ctx) in C:\Users\misir\source\repos\Dropmarker\src\Program.cs:line 280
at SixLabors.ImageSharp.Processing.ProcessingExtensions.ProcessingVisitor.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.Processing.ProcessingExtensions.Mutate(Image source, Configuration configuration, Action`1 operation)
at SixLabors.ImageSharp.Processing.ProcessingExtensions.Mutate(Image source, Action`1 operation)
at Dropmaker.Program.RunOnce(State state) in C:\Users\misir\source\repos\Dropmarker\src\Program.cs:line 278
Steps to Reproduce
It happens sometimes when I compile & run this code.
var image = Image.Load("image.jpg");
image.Mutate(ctx =>
{
ctx.BackgroundColor(Color.White);
});System Configuration
- ImageSharp version: SixLabors.ImageSharp@1.0.0-rc0002
- Environment (Operating system, version and so on): Windows 10 x64
- .NET Framework version: .NET Core 3.1
Activity
[-]Object reference not set to an instance of an object.[/-][+]context.BackgroundColor throws Object reference not set to an instance of an object.[/+]JimBobSquarePants commentedon Jun 16, 2020
What do you mean by this, Is the issue intermittent? What environmental factors trigger a difference in result.
Are you running this in multiple threads?
Use ConcurrentDictionary. Fix #1230
themisir commentedon Jun 16, 2020
I really don't know what triggers the issue. Might be because of multithreaded process or something else. In case you're interested here's source code of the project: Program.cs:288. There might be some sort of low level issue which caused this code to throw an exception.
Yes. I did run this code in multiple threads to reduce time since I need to process thousands of images.
JimBobSquarePants commentedon Jun 16, 2020
Thanks @themisir that's correlates with my findings. If got a fix in motion. #1234