Examples of errors detected by the V3052 diagnostic

V3052. The original exception object was swallowed. Stack of original exception could be lost.

Xamarin.Forms

V3052 The original exception object 'ex' was swallowed. Stack of original exception could be lost. Xamarin.Forms.Core.UnitTests ImageTests.cs 221

static async Task<Stream>
GetStreamAsync (Uri uri, CancellationToken cancellationToken)
{
  try {
    await Task.Delay (5000, cancellationToken);
  } catch (TaskCanceledException ex) {
    cancelled = true;
    throw ex;
  }
  ....
}

Xamarin.Forms

V3052 The original exception object 'ae' was swallowed. Stack of original exception could be lost. Xamarin.Forms.Xaml RegisterXNamesVisitor.cs 38

public void Visit(ValueNode node, INode parentNode)
{
  ....
  try
  {
    ....
  }
  catch (ArgumentException ae)
  {
    if (ae.ParamName != "name")
      throw ae;
    throw new XamlParseException(
      string.Format("An element with the name \"{0}\"
                     already exists in this NameScope",
                    (string)node.Value), node);
  }
}

FlashDevelop

V3052 The original exception object 'uex' was swallowed. Stack of original exception could be lost. FileActions.cs 598

public void Copy(string fromPath, string toPath)
{
  ....
  try
  {
    ....
  }
  catch (UserCancelException uex)
  {
    throw uex;
  }
  ....
}

SharpDevelop

V3052 The original exception object 'ex' was swallowed. Stack of original exception could be lost. ReferenceFolderNodeCommands.cs 130

DiscoveryClientProtocol DiscoverWebServices(....)
{
  try {
    ....
  } catch (WebException ex) {
    if (....) {
      ....
    } else {
      throw ex;
    }
  }
  ....
}

PascalABC.NET

V3052 The original exception object 'e' was swallowed. Stack of original exception could be lost. NETGenerator NETGenerator.cs 925

public void ConvertFromTree(....)
{
  ....
  try
  {
    ....
  }
  catch (System.Runtime.InteropServices.COMException e)
  {
    throw new TreeConverter.SaveAssemblyError(e.Message);
  }
  ....
}

Similar errors can be found in some other places:

• V3052 The original exception object 'e' was swallowed. Stack of original exception could be lost. NETGenerator NETGenerator.cs 929
• V3052 The original exception object 'ex' was swallowed. Stack of original exception could be lost. ICSharpCode.SharpDevelop ReferenceFolderNodeCommands.cs 92
• V3052 The original exception object 'ex' was swallowed. Stack of original exception could be lost. TreeConverter syntax_tree_visitor.cs 16324

ONLYOFFICE Community Server

V3052 The original exception object 'ex' was swallowed. Stack of original exception could be lost. GoogleDriveStorage.cs 267

public DriveFile CopyEntry(string toFolderId, string originEntryId)
{
    var body = FileConstructor(folderId: toFolderId);
    try
    {
        var request = _driveService.Files.Copy(body, originEntryId);
        request.Fields = GoogleLoginProvider.FilesFields;
        return request.Execute();
    }
    catch (GoogleApiException ex)
    {
        if (ex.HttpStatusCode == HttpStatusCode.Forbidden)
        {
            throw new SecurityException(ex.Error.Message);
        }
        throw;
    }
}

Similar errors can be found in some other places:

• V3052 The original exception object 'e' was swallowed. Stack of original exception could be lost. FileConverter.cs 564