Qt5 QJsonDocument method 'toJson()' will crash with bigger arrays

Qt5 brings Json classes that are pretty powerful. As any new feature, it may have some bugs lurking in corner cases.

One of this, is when a Json document is created with somewhat big arrays of elements (e.g 2500 elements, each one looks like:
{
"name": "John",
"surname": "Doe 4"
}

Attached an example to reproduce this bug (plus the generated backtrace). Since it depends on the number of elements (and the number of attributes), I wouldn't be surprised if it is related with a stack issue (is QJson using recursive methods?).