[Bug c++/78693] New: [6/7 Regression] Bogus 'inconsistent deduction for ‘auto’' error when having a dependent initializer and a nondependent one in the same declaration

[rs2740 at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78693

            Bug ID: 78693
           Summary: [6/7 Regression] Bogus 'inconsistent deduction for
                    ‘auto’' error when having a dependent initializer and
                    a nondependent one in the same declaration
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Keywords: rejects-valid
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: rs2740 at gmail dot com
  Target Milestone: ---

template<class T>
void foo (T t) {
  auto i = t, j = 1;
} 

prog.cc: In function 'void foo(T)':
prog.cc:3:3: error: inconsistent deduction for 'auto': 'auto' and then 'int'
   auto i = t, j = 1;
   ^~~~

Accepted by GCC 5.3, Clang, MSVC (CL 19 on gcc.beta.godbolt.org, whatever that
corresponds to) and ICC 17 (but with a bogus warning). Rejected by 6.1 and 7
(on Wandbox).