[Bug c++/69024] New: [cilkpus] cilk_spawn is broken for initializations with implicit conversion operators defined

[ryan.burn at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69024

            Bug ID: 69024
           Summary: [cilkpus] cilk_spawn is broken for initializations
                    with implicit conversion operators defined
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: ryan.burn at gmail dot com
  Target Milestone: ---

The following code should compile but gives this error:

implicit_cast.cpp: In function ‘void g()’:
implicit_cast.cpp:12:28: error: invalid use of ‘_Cilk_spawn’
   double x = _Cilk_spawn f();

/////////////////////////////////////////////////////////////////
struct A {
  operator double() {
    return 33.0;
  }
};

A f() {
  return {};
}

void g() {
  double x = _Cilk_spawn f();
}

int main() {
  g();
  return 0;
}
/////////////////////////////////////////////////////////////////