Merge "Fix check for thread unwind."

  ASSERT_BACKTRACE_FRAME(result, "bar");

}

TEST_F(CrasherTest, seccomp_tombstone_thread_abort) {

  int intercept_result;

  unique_fd output_fd;

  static const auto dump_type = kDebuggerdTombstone;

  StartProcess(

      []() {

        std::thread abort_thread([] { abort(); });

        abort_thread.join();

      },

      &seccomp_fork);

  StartIntercept(&output_fd, dump_type);

  FinishCrasher();

  AssertDeath(SIGABRT);

  FinishIntercept(&intercept_result);

  ASSERT_EQ(1, intercept_result) << "tombstoned reported failure";

  std::string result;

  ConsumeFd(std::move(output_fd), &result);

  ASSERT_BACKTRACE_FRAME(result, "abort");

}

TEST_F(CrasherTest, seccomp_backtrace) {

  int intercept_result;

  unique_fd output_fd;