https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65553
W E Brown <webrown.cpp at gmail dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |andrew.n.sutton at gmail dot com --- Comment #3 from W E Brown <webrown.cpp at gmail dot com> --- Hmm. Looks like this was fairly recently fixed. After I updated from version g++-mp-5 (MacPorts gcc5 5-20150308_0) 5.0.0 20150308 (experimental) to version g++-mp-5 (MacPorts gcc5 5-20150322_0) 5.0.0 20150322 (experimental) the attachment now compiles successfully. Thank you.