Unable to open port: hdf5-18 +gcc47 not installed

[Jeremy Huddleston Sequoia]

This failure seems odd to me.  What's going wrong here?  Was something possibly messed up with recent database issues, or is there a "real" problem?

$ sudo port list outdated
netcdf-fortran                 @4.2            science/netcdf-fortran
slib                           @3b4            devel/slib

$ sudo port -v -s upgrade outdated
Error: Install hdf5-18 +gcc47
Error: Unable to open port: hdf5-18 +gcc47 not installed
To report a bug, follow the instructions in the guide:
    http://guide.macports.org/#project.tickets

$ ls /opt/local/var/macports/software/hdf5-18/
hdf5-18-1.8.12_1+cxx+universal.darwin_13.i386-x86_64.tbz2

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