FYI, I saw this issue after upgrading to macports-base 2.8 on 10.13 from current git master 2.8 release:
$ sudo port -v destroot fluxbox Error: Unable to execute port: sqlite error: another row available (100) while executing query: SELECT cxx_stdlib FROM registry.ports WHERE id=109 $ sudo port clean fluxbox ---> Cleaning fluxbox $ sudo port -v destroot fluxbox Error: Unable to execute port: sqlite error: another row available (100) while executing query: SELECT cxx_stdlib FROM registry.ports WHERE id=109 $ port -v MacPorts 2.7.99 Entering shell mode... ("help" for help, "quit" to quit) > quit Goodbye So I installed a couple of other ports (wget, aria2) and then tried again, and there was no such error after that. $ sudo port -v destroot fluxbox ---> Computing dependencies for fluxbox. ---> Fetching distfiles for fluxbox ---> Verifying checksums for fluxbox ---> Checksumming fluxbox-1.3.7.tar.bz2 ---> Extracting fluxbox ---> Extracting fluxbox-1.3.7.tar.bz2 — and so on I was hoping for a nice, tight, reproducible error report, but this is what I have instead. FWIW. Ken