[Bug c++/72865] Adding __may_alias__ attribute triggers a compilation error

[root at zta dot lk]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=72865

--- Comment #1 from Aleksej Lebedev <root at zta dot lk> ---
Forgot to tell what platform I'm running this:
$ uname -a
Linux zhtw-pc 4.2.0-41-generic #48-Ubuntu SMP Fri Jun 24 11:28:43 UTC 2016
x86_64 x86_64 x86_64 GNU/Linux

Exact version of the GCC:
$ g++ --version
g++ (Ubuntu 5.2.1-22ubuntu2) 5.2.1 20151010
Copyright (C) 2015 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.