text: //
  // immer: immutable data structures for C++
  // Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
  //
  // This software is distributed under the Boost Software License, Version 1.0.
  // See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
  //
  
  // Thanks Guiguiprim for reporting this issue
  // https://github.com/arximboldi/immer/issues/46
  
  #include <immer/flex_vector.hpp>
  #include <immer/vector.hpp>
  #include <immer/vector_transient.hpp>
  
  #include <catch.hpp>
  
  TEST_CASE("operator==() may return bad result")
  {
      using bool_vec = immer::flex_vector<bool>;
  
      immer::vector<bool_vec> v0;
      auto tv = v0.transient();
      tv.push_back(bool_vec(9, false));
      tv.push_back(bool_vec(10, false));
      tv.push_back(bool_vec(8, false));
      tv.push_back(bool_vec(6, false));
      tv.push_back(bool_vec(9, false));
      tv.push_back(bool_vec(7, false));
      tv.push_back(bool_vec(8, false));
      tv.push_back(bool_vec(9, false));
      tv.push_back(bool_vec(10, false));
      v0 = tv.persistent();
  
      auto v1 = v0.update(1, [](bool_vec vec) {
          return vec.set(8, true);
      });
  
      CHECK(v0[1] != v1[1]);
      CHECK(v0 != v1);
  }
  