[cfe-dev] Understand assumptions towards uninitialized variables on stack

[Andrea Bocci via cfe-dev]

Hi Irene,
I am not an expert, but here is my interpretation: "undefined behaviour"
means that the behaviour observed by the person running the compiled
program is not dictated by the C++ standard, and thus the compiler is free
to do whatever it wants.

Setting the value of an uninitialised variable to zero, or to any arbitrary
number, or to a random number, or not setting it at all, would be
acceptable behaviours for "undefined behaviour".

Ciao,
.Andrea
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