[Bug Perl 5.18 - 5.24] warnings from hv_func.h (again?)

This bug is similar to #123483
  https://rt.perl.org/Public/Bug/Display.html?id=123483
but this time with gcc.  For details, see
  http://www.cpantesters.org/cpan/report/5a642070-1a5e-11e6-b928-8293027c4940

These bugs are present starting with (at least) 5.18.  (I did not get
reports from 5.16.  Not in 5.14 or earlier.)

Hope this helps,
Ilya
  

• [Bug Perl 5.18 - 5.24] warnings from hv_func.h (again?) by Ilya Zakharevich
• [Bug Perl 5.24] warning from cop.h by Ilya Zakharevich
• Re: [Bug Perl 5.24] warning from cop.h by Zefram
• Re: [Bug Perl 5.24] warning from cop.h by Dave Mitchell