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New posts in undefined-behavior

Compound literal is created once for a given scope

c language-lawyer undefined-behavior compound-literals

Is it legal to cast a repr(C) struct pointer to pointer to its first field?

rust language-lawyer undefined-behavior

Any reason why 0.0/0.0 makes negative nan in C++?

c++ nan undefined-behavior

Is passing pointer to an array as pointer to pointer UB in C?

c pointers language-lawyer undefined-behavior implicit-conversion

Is it undefined behavior to access an array out of bounds if I know what data is at the accessed adress?

c++ stack undefined-behavior

Is "*this = {}" valid inside a member function for reset in CPP

c++ performance coding-style undefined-behavior

Why doesn't -fsanitize=undefined pick up on (what I think is) UB?

c++ g++ undefined-behavior sanitizer

Understanding Virtual Functions when Deriving from Multiple Classes

c++ multiple-inheritance undefined-behavior virtual-functions reinterpret-cast

Why is integer overflow undefined behavior only for signed integers, and not for unsigned integers?

c++ undefined-behavior integer-overflow

Sequence point && operator

c++ undefined-behavior c++03 operator-precedence sequence-points

Understanding implicit lifetime creation and aliasing in C++

c++ clang language-lawyer undefined-behavior type-punning

Can you overwrite the memory of a union, if no members are active?

c++ language-lawyer undefined-behavior unions c++23

Why does the clang sanitizer think this left shift of an unsigned number is undefined?

c++ undefined-behavior sanitizer

Is it defined behaviour to assign to function call in or in if (C++17)

c++ c++17 undefined-behavior

why would the optimization ignore the if statement when function has warning [-Wreturn-type]?

c++ assembly optimization compiler-optimization undefined-behavior

How does clang manage to compile this code with undefined behavior into this machine code?

c++ compilation clang compiler-optimization undefined-behavior

Is pointer arithmetic still well defined after casting with alignment violation?

c undefined-behavior memory-alignment c11 pointer-arithmetic

If I decrement `std::size_t(0)` is that guaranteed to be equal to `std::size_t(-1)`?

c++ undefined-behavior integer-overflow unsigned-integer

Is a program where undefined behavior (UB) is conditional on implementation leeway a program with unconditional UB?

c++ language-lawyer undefined-behavior
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