V3: Gracefully handle LZW overflows

.github/workflows/build-and-test.yml

@@ -146,7 +146,7 @@ jobs:
           XUNIT_PATH: .\tests\ImageSharp.Tests # Required for xunit
 
       - name: Export Failed Output
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         if: failure()
         with:
           name: actual_output_${{ runner.os }}_${{ matrix.options.framework }}${{ matrix.options.runtime }}.zip

tests/ImageSharp.Tests/Formats/Gif/GifDecoderTests.cs

@@ -334,4 +334,16 @@ public void IssueTooLargeLzwBits<TPixel>(TestImageProvider<TPixel> provider)
         image.DebugSaveMultiFrame(provider);
         image.CompareToReferenceOutputMultiFrame(provider, ImageComparer.Exact);
     }
+
+    // https://github.com/SixLabors/ImageSharp/issues/2859
+    [Theory]
+    [WithFile(TestImages.Gif.Issues.Issue2859_A, PixelTypes.Rgba32)]
+    [WithFile(TestImages.Gif.Issues.Issue2859_B, PixelTypes.Rgba32)]
+    public void Issue2859_LZWPixelStackOverflow<TPixel>(TestImageProvider<TPixel> provider)
+        where TPixel : unmanaged, IPixel<TPixel>
+    {
+        using Image<TPixel> image = provider.GetImage();
+        image.DebugSaveMultiFrame(provider);
+        image.CompareToReferenceOutputMultiFrame(provider, ImageComparer.Exact);
+    }
 }

tests/ImageSharp.Tests/TestImages.cs

@@ -535,6 +535,8 @@ public static class Issues
             public const string Issue2450_B = "Gif/issues/issue_2450_2.gif";
             public const string Issue2198 = "Gif/issues/issue_2198.gif";
             public const string Issue2758 = "Gif/issues/issue_2758.gif";
+            public const string Issue2859_A = "Gif/issues/issue_2859_A.gif";
+            public const string Issue2859_B = "Gif/issues/issue_2859_B.gif";
         }
 
         public static readonly string[] Animated =