Are there sequence points in braced initializer lists when they apply to constructors?

Question

According to the n4296 C++ standard document:

[dcl.init.list] (8.5.4.4) (pg223-224)

Within the initializer-list of a braced-init-list, the

Answer 1

The answer seems to be that yes, this is a bug in both GCC and MSVC.

This is the status of this issue:

1. There are several bugs against GCC regarding init-list rules. Most of them have gone completely unacknowledged by the GCC team. This at least implies that G++ does have bugs here because the issues have not been closed as invalid
2. I have received unofficial word from the MSVC compiler team that this is in fact a bug in their compiler and they are working internally to fix it. However, I have no external bug to point to. As of MSVC 2015 Update 3, the old behavior remains.
3. Clang, which at this point is by far the most pedantic standards-complaint compiler, implements it the way the standard seems to read.

My personal investigation, discussions with C++ experts at conferences, and unofficial answers I've received from compiler developers indicates that this is a bug in MSVC and GCC, but I'm always reluctant to answer my own questions on StackOverflow. But here we are.