`MagickImage.GetColorProfile()` returns non-null value for GIF without color profile

[d2phap]

Magick.NET version

13.7.0

Environment (Operating system, version and so on)

Win 11 23h2

Description

• The MagickImage.GetColorProfile() return non-null for GIF file without color profile.
• Accessing child properties causes System.NotSupportException error
• Note that, in v13.6, the imgM.GetColorProfile() returns null which is correct.

The issue is reported at: https://github.com/d2phap/ImageGlass/issues/1907

Steps to Reproduce

1. Download sample file:
2. Run this code with Magick.NET 13.7:

var path = @"C:\Users\d2pha\Desktop\test.gif";
using var imgM = new MagickImage(path);
var cp = imgM.GetColorProfile();

if (cp != null) // cp is not null here
{
    // accessing cp.ColorSpace throws exception
    var colorSpaceName = cp.ColorSpace.ToString();
}

3. See error:

[dlemstra]

This is caused by the following bug inside ImageMagick: https://github.com/ImageMagick/ImageMagick/issues/7281. This will be resolved in the next release.