[Bug fortran/84591] New: Compiling gfortran.dg/bind_c_usage_10.f03 with -fdefault-integer-8 gives errors

["dominiq at lps dot ens.fr" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84591

            Bug ID: 84591
           Summary: Compiling gfortran.dg/bind_c_usage_10.f03 with
                    -fdefault-integer-8 gives errors
           Product: gcc
           Version: 8.0.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: dominiq at lps dot ens.fr
  Target Milestone: ---

Compiling gfortran.dg/bind_c_usage_10.f03 with -fdefault-integer-8 gives
errors:

/opt/gcc/_clean/gcc/testsuite/gfortran.dg/bind_c_usage_10.f03:66:31:

   integer(c_int) function func4()
                               1
Error: FUNCTION result func4 can't be of type INTEGER(4) in FUNCTION func4 at
(1)
/opt/gcc/_clean/gcc/testsuite/gfortran.dg/bind_c_usage_10.f03:59:31:

   integer(c_int) function func3() bind(c, name="myFunc3")
                               1
Error: FUNCTION result func3 can't be of type INTEGER(4) in FUNCTION func3 at
(1)
/opt/gcc/_clean/gcc/testsuite/gfortran.dg/bind_c_usage_10.f03:52:31:

   integer(c_int) function func2()
                               1
Error: FUNCTION result func2 can't be of type INTEGER(4) in FUNCTION func2 at
(1)
/opt/gcc/_clean/gcc/testsuite/gfortran.dg/bind_c_usage_10.f03:45:31:

   integer(c_int) function func1() bind(c, name="myFunc1")
                               1
Error: FUNCTION result func1 can't be of type INTEGER(4) in FUNCTION func1 at
(1)

(1) I don't understand why there are these errors.

(2) I didn't find a way to silence them.