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  1. Qt
  2. QTBUG-66946

QSharedDataPointer detaches on ptrInst == nullptr

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    • None
    • 4.0.1, 5.6, 5.7, 5.8, 5.9, 5.10.1, 5.11.0 Beta 1
    • Core: Other
    • None

      QSharedDataPointer doesn't implement

      friend bool operator==(T *a, QSharedDataPointer<T> const &b) const

      and

      friend bool operator==(QSharedDataPointer<T> const &a, T *b) const

      Because of this, the shared pointer detaches on

      ptrInst == nullptr

      Example:

      QSharedDataPointer<int> ptrInst(new int(-1));
QSharedDataPointer<int> secondInst = ptrInst; // ref()
bool isNull;
isNull = !ptrInst; // ok, no detach()
isNull = ptrInst == nullptr; // NOT OK, detaches!

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            thiago Thiago Macieira
            mhennings Martin Hennings
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              Created:
              Updated:
              Resolved:

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