CUDA: invalid device function

[ibaned]

I'm having a hard time tracking down what is causing this in our application, so this issue is really just created in the hopes that another Kokkos dev recognizes this error and remembers some known cause of it...
If I figure this out I'll post what I find out here, and hopefully propose an additional safety check to Kokkos to cause a more intuitive error.

  cudaFuncSetCacheConfig( cuda_parallel_launch_local_memory< DriverType, LaunchBounds::maxTperB, LaunchBounds::minBperSM > , cudaFuncCachePreferL1 ) error( cudaErrorInvalidDeviceFunction): invalid device function /home/daibane/ride/install/Trilinos/include/Cuda/Kokkos_CudaExec.hpp:262

[ibaned]

We think this was the consequence of what I'll call a use-after-scope bug. Below is an example of what that means:

#include <iostream>

struct Data {
  Data(double in) : value(in) {}
  double value;
};

struct Class {
  Data* ptr;
  Class(Data &ref) : ptr(&ref) {}
  void foo() { std::cout << ptr->value << '\n'; }
};

static Class make_thing(double in) {
  Data local_data(in);
  return Class(local_data);
}

int main() {
  auto thing = make_thing(42.0);
  thing.foo();
}

Its quite hard to detect... anyway, not a Kokkos issue.