Catch ParseException on get HTML

app/src/main/java/eu/faircode/email/MessageHelper.java

@@ -800,10 +800,11 @@ public class MessageHelper {
                 throw new FolderClosedException(ex.getFolder(), "getHtml", ex);
             } catch (Throwable ex) {
                 Log.w(ex);
-                text = true;
+                warnings.add(ex.getMessage());
-                result = ex + "\n" + android.util.Log.getStackTraceString(ex);
+                return null;
             }
 
+            try {
                 ContentType ct = new ContentType(part.getContentType());
                 String charset = ct.getParameter("charset");
                 if (TextUtils.isEmpty(charset)) {
@@ -818,6 +819,10 @@ public class MessageHelper {
                             !"US-ASCII".equals(charset.toUpperCase()))
                         warnings.add(context.getString(R.string.title_no_charset, charset));
                 }
+            } catch (ParseException ex) {
+                Log.w(ex);
+                warnings.add(ex.getMessage());
+            }
 
             if (part.isMimeType("text/plain") || text) {
                 result = TextUtils.htmlEncode(result);