Not uploading files when using gzipRename

[leejt489]

I think gzipRename might be broken? The zipped files are not showing up in my bucket, though the output says that they were uploaded. Here is my config:

aws_s3: {
      options: {
        accessKeyId: '<%= aws.awsAccessKeyId %>', // Use the variables
        secretAccessKey: '<%= aws.awsSecretKey %>', // You can also use env variables
        region: 'us-west-2',
        uploadConcurrency: 5, // 5 simultaneous uploads
        downloadConcurrency: 5, // 5 simultaneous downloads
      },
      staging: {
        options: {
          bucket: 'stagingbucket',
          differential: true, // Only uploads/deletes the files that have changed,
          gzipRename: 'ext',
        },
        files: [
          { action: 'upload', src: '**', dest: '/', cwd: 'release', expand: 'true' },
          { action: 'delete', dest: '/', cwd: 'release', },
        ],
      },
      production: {
        options: {
          bucket: 'productionbucket.com',
        },
        files: [
          { action: 'upload', src: '**', dest: '/', cwd: 'release', expand: true, },
          { action: 'delete', dest: '/', cwd: 'release', },
        ],
      },
    },

If I run without the gzipRename the files are uploaded with the .js.gz extension.