Failed to load resource: file:///!gap_exec

Whenever I run cordova.exec with an empty command queue, I get this error in the new iOS 6 Web Inspector in Safari:

file:///!gap_exec Failed to load resource: The requested URL was not found on this server.

It's caused by this XMLHttpRequest:

execXhr.open('HEAD', "file:///!gap_exec", true);

Looks like the Obj-C code hears this request as a signal to begin executing the command queue, but it doesn't return a success response, so Web Inspector complains about not being able to load the resource.

It doesn't seem to affect functionality, but it sure is annoying to have all those "failed to load resource" errors in the console.