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Bug
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    Resolution: Done
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P2: Important
 - 
    Qt Creator 4.5.0-beta1
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    Windows 10 1703 64 bit
Qt 5.9.1
MSVC 2015 64 bit
cdb 10.0 64 bit 
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        eeb0358d65620f6de39649fbe8b43ee44b5fff8c
 
- Open qtdeclarative/examples/quick/demos/samegame/samegame.qmlproject from Qt5's repository.
The problem will be the same if you open the .pro-file instead. - Place a breakpoint at the first line of the startNewGame() function (samegame.js) which contains executable code (i.e. not (only) a comment).
 - Start debugging app
 - In the app, click "1 Player".
The breakpoint is being hit. - Try to change the value of "this->gameMode" in the Locals and Expressions view.
It does not work. 
It should be possible to change this value. With numeric values this seems to work.