pkg install broken in 10.3, error code 70

I've just did a clean install of 10.3-RELEASE.

I was able to install packages, rebooted the system, and now every time I do pkg install ..., it behaves like an pkg(8) update BUT terminates with error code 70.

pkg install nano
Updating FreeBSD repository catalogue...
FreeBSD repository is up-to-date.
All repositories are up-to-date.
Those look alright. Have you tried forcing an update of the repository? pkg update -f
Same thing, 10.2 on AWS. Appears to return 70 if one of the packages requested has already been installed. Using -f fixes it:

pkg install -y python27

returns 70, whereas

pkg install -yf python27

forces a reinstall and returns 0.
theDave, thanks for the information, I can confirm it! pkg breaks installation if one of the to-be-installed packages is already installed! Also, good to find out that this is not related to 10.2 / 10.3 but a regression in pkg 1.7.1. I've reported it for maintainers.