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    Bug 
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    Resolution: Done
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    P4: Low 
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    Qt Creator 4.0.0-rc1
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    Windows 10, VC19 toolchain
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        bc4a24db00c14a97b1d1dbdf36639a5e6c16a3bf
Qtc 4 rc, and Microsoft Visual C++ BUild Tools - pay your attention, not a VIsual Studio but standalone build tools. see first scrennshot; bild tools for x64 available
after selecting this compiler for a kit, I'm saving this and using for the development as usual. 
after restart qtc, compiler in a kit is empty, see screnshot 3. 



