[Bug c++/66995] New: First declaration as inline after definition of function

[anders.granlund.0 at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66995

            Bug ID: 66995
           Summary: First declaration as inline after definition of
                    function
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: anders.granlund.0 at gmail dot com
  Target Milestone: ---

Consider the following program (prog.cc):

  void f() {}
  inline void f();
  int main() {}

It is ill-formed by [dcl.fct.spec]/4 (http://eel.is/c++draft/dcl.fct.spec#4):

"If the definition of a function appears in a translation unit before its first
declaration as inline, the program is ill-formed."

Therefore I expected gcc to give at least one diagnostic message when compiling
it, but I get none with the following command line:

  g++ prog.cc -std=c++98 -pedantic-errors

I have tried with gcc HEAD 6.0.0 20150722 here:

  http://melpon.org/wandbox/permlink/c6wrML22huCFZMxp