linux-image appears in popup summary, cannot file bug against it

I tried to file a bug against Ubuntu. I did not know the package name, so I clicked on "(Choose…)". I wanted to report a bug against the kernel, so I typed in "linux". "linux-image" was the first entry in the popup list at https://launchpad.net/distros/ubuntu/@@popup-window?search=linux-image&vocabulary=BinaryAndSourcePackageName&field=field.packagename

This led me to believe that linux-image was a valid package name and I could file a bug against it. However, attempts to submit gave an Oops and Andrew Bennetts said that the error was:
11:52 <spiv> Exception type INotFoundError
11:52 <spiv> Exception value I'Unpublished binary package: linux-image'

It is undesirable that things appear in that list that I cannot file bugs against, and more undesirable that instead of seeing the error "Unpublished binary package: linux-image" I have to ask a Launchpad developer to provide it for me.

See also https://launchpad.net/products/launchpad/+bug/31581