This is an unofficial snapshot of the ISO/IEC JTC1 SC22 WG21 Core Issues List revision 110b. See http://www.open-std.org/jtc1/sc22/wg21/ for the official list.
According to 9.4 [dcl.init] paragraph 5,
To zero-initialize an object of type T means:
if T is a reference type, no initialization is performed.
However, a reference is not an object, so this makes no sense.
Proposed resolution (March, 2010):
This issue is resolved by the resolution of issue 633 in document N2993.