fixed #159 for the other known case, test image is too big though, won't add it

src/ImageSharp/Formats/Jpeg/GolangPort/Components/Decoder/InputProcessor.cs

@@ -245,7 +245,12 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.GolangPort.Components.Decoder
             {
                 if (this.Bits.UnreadBits == 0)
                 {
-                    this.Bits.EnsureNBits(1, ref this);
+                    this.LastErrorCode = this.Bits.EnsureNBitsUnsafe(1, ref this);
+
+                    if (this.HasError)
+                    {
+                        return this.LastErrorCode;
+                    }
                 }
 
                 if ((this.Bits.Accumulator & this.Bits.Mask) != 0)

src/ImageSharp/Formats/Jpeg/GolangPort/Components/Decoder/OrigJpegScanDecoder.cs

@@ -137,6 +137,8 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.GolangPort.Components.Decoder
         /// <param name="decoder">The <see cref="OrigJpegDecoderCore"/> instance</param>
         public void DecodeBlocks(OrigJpegDecoderCore decoder)
         {
+            decoder.InputProcessor.ResetErrorState();
+
             int blockCount = 0;
             int mcu = 0;
             byte expectedRst = OrigJpegConstants.Markers.RST0;
@@ -364,7 +366,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.GolangPort.Components.Decoder
                     {
                         int value;
                         decoder.InputProcessor.DecodeHuffmanUnsafe(ref decoder.HuffmanTrees[huffmannIdx], out value);
-                        if (!decoder.InputProcessor.CheckEOF())
+                        if (decoder.InputProcessor.HasError)
                         {
                             return;
                         }
@@ -381,11 +383,16 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.GolangPort.Components.Decoder
 
                             int ac;
                             decoder.InputProcessor.ReceiveExtendUnsafe(val1, out ac);
-                            if (!decoder.InputProcessor.CheckEOFEnsureNoError())
+                            if (decoder.InputProcessor.HasError)
                             {
                                 return;
                             }
 
+                            //if (!decoder.InputProcessor.CheckEOFEnsureNoError())
+                            //{
+                            //    return;
+                            //}
+
                             // b[Unzig[zig]] = ac << al;
                             value = ac << this.al;
                             Block8x8.SetScalarAt(b, this.pointers.Unzig[zig], (short)value);

tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.cs

@@ -37,8 +37,6 @@ namespace SixLabors.ImageSharp.Tests.Formats.Jpg
                 TestImages.Jpeg.Baseline.Jpeg444,
                 TestImages.Jpeg.Baseline.Bad.BadEOF,
                 TestImages.Jpeg.Baseline.Bad.ExifUndefType,
-
-                TestImages.Jpeg.Issues.MissingFF00Gear159,
             };
 
         public static string[] ProgressiveTestJpegs =

tests/ImageSharp.Tests/TestImages.cs

@@ -117,7 +117,6 @@ namespace SixLabors.ImageSharp.Tests
             {
                 public const string CriticalEOF214 = "Jpg/issues/Issue214-CriticalEOF.jpg";
                 public const string MissingFF00ProgressiveGirl159 = "Jpg/issues/Issue159-MissingFF00-Progressive-Girl.jpg";
-                public const string MissingFF00Gear159 = "Jpg/issues/Issue159-MissingFF00-Gear.jpg";
                 public const string BadCoeffsProgressive178 = "Jpg/issues/Issue178-BadCoeffsProgressive-Lemon.jpg";
             }