gdb crashes when trying to set a value that is already set

Steps to reproduce:

• create a simple Qt Gui App (I've used template from wizard)
• select kit using Qt4 and gcc/gdb and start debugging
• if inferior comes up, hit 'Interrupt' (you should be inside main())
• inside locals and expressions unfold 'argv'
• double click on the value of its first child ((argv)), do not change the value, just click somewhere else

Expected result:

• Nothing happens

Current result:

• gdb crashes and debbugging finishes