This is an unofficial snapshot of the ISO/IEC JTC1 SC22 WG21 Core Issues List revision 112e. See http://www.open-std.org/jtc1/sc22/wg21/ for the official list.
6.8.2 [basic.fundamental] paragraph 5 refers to a C header instead of to its C++ equivalent:
...Types char16_t and char32_t denote distinct types with the same size, signedness, and alignment as uint_least16_t and uint_least32_t, respectively, in <stdint.h>, called the underlying types.
Rationale (August, 2011)
This is an editorial issue that has been transmitted to the project editor.