_CrtIsValidHeapPointer Error

[navi1084]

Hi,
Can anyone tell what is the reason for cause of _CrtIsValidHeapPointer Error???

Thank You

[jpn]

For example deleting something twice.

int* i = new int;
delete i;
delete i;

int* i = new int;
delete i;
delete i;

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Remember that QObjects take ownership of their children. Here's an example how it could happen with QObjects:

{
    QObject a;
    QObject b;
    a.setParent(&b);
}

{
    QObject a;
    QObject b;
    a.setParent(&b);
}

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First "b" goes out of scope and gets destructed according to normal C++ rules. "b" is a parent of "a" so it will automatically delete "a". Then "a" goes out of scope and gets destructed, but it was already deleted by "b" --> crash.