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New posts in undefined-behavior

Accessing the same memory location twice, UB or not?

c language-lawyer undefined-behavior

Is fetching the value of an invalid pointer undefined or implementation defined behaviour in C?

c pointers undefined-behavior invalid-pointer

Is opening the SAME file in two different fstreams Undefined Behaviour?

c++ fstream undefined-behavior

Why can I modify const_cast-ed object in constexpr function?

c++ undefined-behavior c++20 constexpr

Subtracting 1 vs decrementing an iterator

c++ pointers iterator undefined-behavior pointer-arithmetic

c - Why does i = ++i invoke undefined behaviour? [duplicate]

c increment undefined-behavior operator-precedence sequence-points

reinterpret_cast from object to first member

c++ c++11 type-conversion undefined-behavior reinterpret-cast

What is the point of undefined behavior? [duplicate]

c++ c language-lawyer undefined-behavior

Detecting access to out-of-scope variables

c++ c valgrind undefined-behavior

Is it undefined behavior in the case of the private functions call in the initializer list?

c++ constructor constants undefined-behavior

Why is this Undefined Behavior?

c++ undefined-behavior sequence-points

Why does Excel translate `=10**-2` to `=0.1`?

excel undefined-behavior mathematical-expressions

Is it undefined behaviour to access an array beyond its end, if that area is allocated? [duplicate]

c undefined-behavior

Is this undefined?

c undefined-behavior

Can a variable be used while being declared?

c++ c variables language-lawyer undefined-behavior

How can I create a macro which uses a value multiple times, without copying it?

c++ c++11 macros undefined-behavior forwarding-reference

Is printf()'s string width safe with unterminated strings?

c printf language-lawyer undefined-behavior

In a function call, why isn't comma a sequence point?

c undefined-behavior sequence-points

Constant time `contains` for `std::vector`? [duplicate]

c++ time-complexity contains stdvector undefined-behavior

Java list.contains returning false, should be true [duplicate]

java undefined-behavior
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