https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87359
--- Comment #24 from Jürgen Reuter <juergen.reuter at desy dot de> --- Paul, enjoy your time in Wales. Maybe this other issue wasn't caused by r263916 but by something else (though it must have been also in the past 2-3 weeks). What our functional tests do: they call a code generator (written in OCaml) to generate Fortran code, compile it and link it into a dynamical library. This is then run by the main program, does a Monte Carlo integration. I'll try to find out as much as possible but my time is limited the next 1-2 weeks. On my university computers I am working with older versions (5.4 mainly because of Ubuntu 16), so no problem in my current work. I only follow the strategy on my laptop to follow the gcc development closely to catch possible issues before your official releases.