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.
[Accepted as a DR at the November, 2019 meeting.]
According to 9.2.8 [dcl.inline] paragraph 5,
The inline specifier shall not appear on a block scope declaration.
Function parameters, however, are not block scope declarations, but they should also not be declared inline.
Proposed resolution (November, 2019):
Change 9.2.8 [dcl.inline] paragraph 5 as follows:
The inline specifier shall not appear on a block scope declaration