code Code:
  1. usershm.lock();
  2. char *to = (char*)usershm.data();
  3. const char *from = this->data.data();
  4. memcpy(to, from, qMin(usershm.size(), usershm.size()));
  5. usershm.unlock();
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fixed... usercache replaced this->data.data();... but app still crash...