delete c++ object causes an error?

[hicz]

I was working on some custom json nodes.

I wanted to export some data using json format, so I did that like as follow in cookMySop:

    UT_JSONValueMap *rootMap = new UT_JSONValueMap;
    UT_JSONValue *floatV = new UT_JSONValue(35.0);
    rootMap->append("Value1", floatV);
    rootValue->setMap(rootMap);//rootValue is an object of UT_JSONValue
    rootValue->saveToFile("G:\\test.json");

after that, I wanted to remove temp exporting data:

    rootValue->setNull();

    delete rootMap;
    rootMap = nullptr;

    delete floatV;
    floatV = nullptr;

however, using "delete" caused an error.

without "delete" everything works fine, but I am afraid there can be some memory leakage.

is there something wrong?

[Stalkerx777]

Without looking into that classes, I would assume that UT_JSONValueMap->append() takes ownership of its contents and deleting rootMap also deletes the floatV data, and so you're getting a "double free" error. See if UT_JSONValueMap owns the values and if so, you don't need to delete floatV yourself.

[hicz]

41 minutes ago, Stalkerx777 said:

Without looking into that classes, I would assume that UT_JSONValueMap->append() takes ownership of its contents and deleting rootMap also deletes the floatV data, and so you're getting a "double free" error. See if UT_JSONValueMap owns the values and if so, you don't need to delete floatV yourself.

Thank you, tested that, deleting outer object and all its members were gone with it. There is no need to delete member objects manually.