[Bug]: Dyno tertiary POI-defined method causes assertion

[DanilaFe]

The following program:

record Inner {
}

record Outer {
  forwarding var inner: Inner;
}

proc foo(x) {
  x.foo(1);
  compilerWarning("lol lmao", 0);
}

proc ctx1() {
  proc Inner.foo(x) do compilerWarning("inner foo called");
  (new Outer()).foo(1);
  foo(new Outer());
}

ctx1();

Creates an assertion error:

at resolution-queries.cpp:3455:7
   3452       auto& m = rv->poiTraceToChild;
   3453       auto p = std::make_pair(poiTrace, std::move(x));
   3454       auto check = m.insert(std::move(p));
-> 3455       CHPL_ASSERT(check.second);
   3456       return check.first->second;

This discovery was incidental while trying to figure out other POI-related troubles, so I haven't had the chance to investigate further.