https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66971
Pádraig Brady <P at draigBrady dot com> changed:
What |Removed |Added
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CC| |P at draigBrady dot com
--- Comment #2 from Pádraig Brady <P at draigBrady dot com> ---
This is an issue with gcc 5.3.1
This is _not_ an issue with gcc 6.3.1 or gcc 7.3
I'm thinking this was addressed in the significant refactoring for bug #66653
