Corrupt QCow2 Image when new qcow2 image created from Cloud Image

[sswastik02]

I tried creating a new qcow2 image from a cloud image of Ubuntu 18.04 LTS that I got from Ubuntu Cloud Images, here is the link.

I used this library to create the qcow2 image using cloud image as the backing file. here is the code:

	diskOpts := qcow2.Opts{
		Filename:      diskPath,
		Fmt:           "qcow2",
		Size:          vmcfg.DiskSize * 1024 * 1024 * 1024,
		ClusterSize:   64 * 1024,
		BackingFile:   imgFilePath,
		BackingFormat: "qcow2",
	}
        qcow2.Create(&diskOpts)

When I try to verify this using qemu-img,

qemu-img info <diskPath>

I get the following errors in the output

ERROR: counting reference for region exceeding the end of the file by one cluster or more: offset 0x70000 size 0x400

1 errors were found on the image.
Data may be corrupted, or further writes to the image may corrupt it.
Image end offset: 196608

Can someone please guide me here? Maybe I am doing something wrong?