Linking unwind library statically results in core dump

Question

This code, compiles with g++ using -std=c++11. Linking with g++, when libunwind is linked in statically program crashes after catching in exerciseBug (after rethrow). LDFLAGS that result in crash:

-Wl,-Bstatic -lunwind -Wl,-Bdynamic -llzma

when libunwind is linked in dynamically, code works as normally. LDFLAGS that result in normal operation:

-Wl,-Bstatic -Wl,-Bdynamic -lunwind -llzma

#include <iostream>

using namespace std;

void exerciseBug()
{
  try {
    throw exception();
  } catch (exception &err) {
    cerr << "caught in exerciseBug\n";
    throw;
  }
}


int main()
{
  try {
    exerciseBug();
  } catch (exception &err) {
    cerr << "caught in main\n";
    ::exit(0);
  }
}

Question is why is does libunwind need to be dynamically linked in? (Running on Ubuntu 16.04; g++ (Ubuntu 5.4.0-6ubuntu1~16.04.4) 5.4.0 20160609)