[Bug target/96835] New: Constructor in offload template class

[tobias.weinzierl at durham dot ac.uk]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96835

            Bug ID: 96835
           Summary: Constructor in offload template class
           Product: gcc
           Version: 10.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: tobias.weinzierl at durham dot ac.uk
  Target Milestone: ---

I have a simple templated vector class with multiple constructors:

#ifdef GPUOffloading
#pragma omp declare target
#endif
template<int Size, typename Scalar>
struct tarch::la::Vector {
  private:
    Scalar _values[Size];

  public:
    Vector();

    Vector (const Scalar& initialValue);

[...]

This code translates fine and I can use the vector class as long as I do not
use one of the constructors (all the other non-overloaded routines work fine).
I either get

lto1: internal compiler error: Segmentation fault

or an undefined symbol error.