[Bug c++/56567] [4.8 Regression] ICE with lambda return type deduction and braced-init-list

[potswa at mac dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56567

--- Comment #4 from David Krauss <potswa at mac dot com> 2013-03-10 02:18:18 UTC ---
Note, there is nothing in the Standard to prohibit return of an
initializer_list value, so this rejects programs which are conformant.

Unless/until #56568 is resolved, doing so results in UB (whether or not that's
a bug). That's only if the function is executed.

It's certainly legal to compile a function returning an std::initializer list,
which is never called. So this fix is problematic. For example

[]{ return std::initializer_list< int >{ 1, 2 }; }();

Not filing another report yet because I haven't pulled the changes and tested
anything for myself.