Crashes, freezes, BSOD, inability to boot.  It all depends on the computer (hardware, OS, drivers, software).  I found that it caused my previous system to freeze on occasion requiring a hard reboot.  Doesn't always happen immediately - maybe only when taxing the system.  Sort of like when overclocking cpus.

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C makes it easy to shoot yourself in the foot. C++ makes it harder, but when you do, you blow your whole leg off.

 -- Bjarne Stroustrup

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