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Strange Access violation after breakpoint

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i’m using Qt and already wrote some app, but later i have changed some part of it, set bp in interesting to me places and catch an access violation. I’ve tried use qt 4.8 or qt 5 from public installer, build stable version from git, build betta version, reinstall MSVC and Windows, but always same – i can run my newly builded app or older version and it’s works fine, all other my apps also, but when i set a bp in app which uses QT and continue or step after it i’m catching exception, even in test project created by QT Add-in automaticaly. In all cases the address where AV happened is different, but always this address range is not using by anyone. I realy confused. I faced before with this, but it was caused by heap corruption. But in default qt project it’s nearly impossible.

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