Add solution log for unhandled PNG file

shadows/framework/src/main/java/org/robolectric/shadows/ImageUtil.java

@@ -18,6 +18,7 @@
 import java.io.InputStream;
 import java.io.OutputStream;
 import java.util.Iterator;
+import javax.imageio.IIOException;
 import javax.imageio.IIOImage;
 import javax.imageio.ImageIO;
 import javax.imageio.ImageReader;
@@ -59,29 +60,48 @@ static Point getImageSizeFromStream(InputStream is) {
   }
 
   static RobolectricBufferedImage getImageFromStream(InputStream is) {
+    return getImageFromStream(null, is);
+  }
+
+  static RobolectricBufferedImage getImageFromStream(String fileName, InputStream is) {
     if (!initialized) {
       // Stops ImageIO from creating temp files when reading images
       // from input stream.
       ImageIO.setUseCache(false);
       initialized = true;
     }
 
+    String format = null;
     try {
       ImageInputStream imageStream = createImageInputStream(is);
       Iterator<ImageReader> readers = ImageIO.getImageReaders(imageStream);
-      if (!readers.hasNext()) return null;
+      if (!readers.hasNext()) {
+        return null;
+      }
 
       ImageReader reader = readers.next();
       try {
         reader.setInput(imageStream);
-        String format = reader.getFormatName();
+        format = reader.getFormatName();
         int minIndex = reader.getMinIndex();
         BufferedImage image = reader.read(minIndex);
         return RobolectricBufferedImage.create(image, ("image/" + format).toLowerCase());
       } finally {
         reader.dispose();
       }
     } catch (IOException e) {
+      Throwable cause = e.getCause();
+      if (FORMAT_NAME_PNG.equalsIgnoreCase(format)
+          && cause instanceof IIOException
+          && cause.getMessage() != null
+          && cause.getMessage().contains("Invalid chunk length")) {
+        String pngFileName = "(" + (fileName == null ? "not given PNG file name" : fileName) + ")";
+        System.err.println(
+            "The PNG file"
+                + pngFileName
+                + " cannot be decoded. This may be due to an OpenJDK issue with certain PNG files."
+                + " See https://github.com/robolectric/robolectric/issues/6812 for more details.");
+      }
       throw new RuntimeException(e);
     }
   }

shadows/framework/src/main/java/org/robolectric/shadows/ShadowBitmapFactory.java

@@ -75,15 +75,16 @@ protected static Bitmap decodeResource(Resources res, int id, BitmapFactory.Opti
     final TypedValue value = new TypedValue();
     InputStream is = res.openRawResource(id, value);
 
-    RobolectricBufferedImage image = getImageFromStream(is);
+    String resourceName = res.getResourceName(id);
+    RobolectricBufferedImage image = getImageFromStream(resourceName, is);
     if (!allowInvalidImageData && image == null) {
       if (options != null) {
         options.outWidth = -1;
         options.outHeight = -1;
       }
       return null;
     }
-    Bitmap bitmap = create("resource:" + res.getResourceName(id), options, image);
+    Bitmap bitmap = create("resource:" + resourceName, options, image);
     ShadowBitmap shadowBitmap = Shadow.extract(bitmap);
     shadowBitmap.createdFromResId = id;
     return bitmap;
@@ -102,7 +103,7 @@ protected static Bitmap decodeFile(String pathName, BitmapFactory.Options option
     if (pathName != null && new File(pathName).exists()) {
       try (FileInputStream fileInputStream = new FileInputStream(pathName);
           BufferedInputStream bufferedInputStream = new BufferedInputStream(fileInputStream)) {
-        image = getImageFromStream(bufferedInputStream);
+        image = getImageFromStream(pathName, bufferedInputStream);
       } catch (IOException e) {
         Logger.warn("Error getting size of bitmap file", e);
       }