Half of specific PNG image fails to load on .NET 6

[PJB3005]

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 DEBUG and RELEASE mode
• I have searched open and closed issues to ensure it has not already been reported

Description

I have this specific PNG image of which the bottom half gets cut off when I try to load it with ImageSharp. It only happens on .NET 6 (preview 6), .NET 5 is fine. No other editor/viewer I tried it with (paint, paint.net, krita, windows photo viewer (old and windows 10 one), chrome, firefox) fails to load this image.

here is the image:

(5C8E5A1B4B577E68A21E1384B5A11C5B1A38B59AC5210C583C6D577CCAF96E23 SHA256 hash but github shouldn't change it on upload).

If I load and save this with ImageSharp, I get the following result:

Re-saving the image by, for example, running it through optipng magically fixes the problem.

Steps to Reproduce

Download the image, then run it through some C# code like this:

var img = Image<Bgra32>.Load("000000drizzletest.png");

img.SaveAsPng("foo.png");

System Configuration

• ImageSharp version: 1.0.3
• Other ImageSharp packages and versions: None
• Environment (Operating system, version and so on): Windows 10 Pro 19042.1110
• .NET Framework version: .NET 6
• Additional information: If you're wondering what made this cursed PNG file, it's an img Xtra for Adobe Director. No, you don't want to know.

[brianpopow]

that issue was fixed with #1707

You can try our nightly builds from here: Nightly