Fix a potential null dereference and potential race conditions

Author: Sergey Firsov

marketplace/release-notes/10.1.2.txt

@@ -0,0 +1 @@
+Added null checks and synchronizations.

src/CommunityCommons/CommunityCommons.mpr

@@ -63,11 +63,11 @@ public abstract static class IterateCallback<T1, T2> {
 
 		public abstract void hit(T1 key, T2 value) throws Exception;
 
-		public void exit() {
+		synchronized public void exit() {
 			stop = true;
 		}
 
-		public void remove() {
+		synchronized public void remove() {
 			mapIter.remove();
 		}
 

src/CommunityCommons/javasource/communitycommons/Misc.java

@@ -38,8 +38,10 @@ public IMendixObject executeAction() throws Exception
 		ImageDimensions imageDimensions = new ImageDimensions(getContext());
 		try (InputStream inputStream = Core.getImage(getContext(), this.ImageParameter.getMendixObject(), false)) {
 			BufferedImage bimg = ImageIO.read(inputStream);
-			imageDimensions.setHeight(bimg.getHeight());
-			imageDimensions.setWidth(bimg.getWidth());
+			if (bimg != null) {
+				imageDimensions.setHeight(bimg.getHeight());
+				imageDimensions.setWidth(bimg.getWidth());
+			}
 		}
 
 		return imageDimensions.getMendixObject();