QtWidgets: Some stylesheets explode Designer and the whole linux terminal (recursion crash)

To reproduce:

1. Open Designer and create empty widget. Drop a check box widget into it.
2. Click the main form and modify "styleSheet" property. Set the value to:

QCheckBox { qproperty-styleSheet: "QCheckBox { qproperty-text: foobar; }"; }

3. Click OK - crash. It also exploded my terminal once and black screen appeared.

Alternatively, to reproduce it outside of Designer, run the attached example: qtbug94448.zip.

A side note - if it's possible to style ANY widget property like this (through "qproperty-propertyName"), I see a big security hole for all Qt applications - isn't it?