[Bug c++/67065] New: Missing diagnostics for ill-formed program with main variable instead of function

[anders.granlund.0 at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67065

            Bug ID: 67065
           Summary: Missing diagnostics for ill-formed program with main
                    variable instead 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: ---

The following program is ill-formed (proc.cc):

  int main;

Compile it with the following command line:

  clang++ prog.cc -std=c++14 -pedantic-errors

No error messages are given. Since the program is ill-formed I expected to get
at least one error message.

The program is ill-formed by following sentence in [basic.start.main]p3
(http://eel.is/c++draft/basic.start.main#3):

"A program that declares a variable main at global scope or that declares the
name main with C language linkage (in any namespace) is ill-formed."

I have tired this with gcc HEAD 6.0.0 20150729 here:

http://melpon.org/wandbox/permlink/uxZxjSFQqBPYXB8b