[Bug c++/72806] New: Extra note/missing not location for __builtin_va_list

[denis.campredon at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=72806

            Bug ID: 72806
           Summary: Extra note/missing not location for __builtin_va_list
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: denis.campredon at gmail dot com
  Target Milestone: ---

Compiling the following code
----------------
void f(struct __builtin_va_list* ap);
----------------

Will result in an unfinished message

./Messages.h:1:15: error: using typedef-name ‘__builtin_va_list’ after ‘struct’
 void f(struct __builtin_va_list* ap);
               ^~~~~~~~~~~~~~~~~
cc1plus: note: ‘__builtin_va_list’ has a previous declaration here

I would expect no note or the compiler saying that __builtin_va_list is a
builtin_type.