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New posts in undefined-behavior

Which enum values are undefined behavior in C++14, and why?

c++ enums c++14 language-lawyer undefined-behavior

Post-increment and variable re-use in a single statement, Perl 5 vs Perl 6

perl undefined-behavior raku sequence-points

In C, is it ever safe to cast a variadic function pointer to a function pointer with finite arguments?

c undefined-behavior variadic-functions calling-convention

Does using bitwise not operator (~) on boolean values invoke Undefined Behavior?

c++ bit-manipulation language-lawyer undefined-behavior

Are there cases where downcasting an actual Base to a Derived would be defined?

c++ casting undefined-behavior

Why isn't it undefined behaviour to destroy an object that was overwritten by placement new?

c++ language-lawyer undefined-behavior object-lifetime placement-new

Why deleting void* is UB rather than compilation error?

c++ language-lawyer undefined-behavior delete-operator void-pointers

Is (int32_t) 255 << 24 undefined behavior in gcc (C++11)?

c++ c++11 language-lawyer undefined-behavior bit-shift

Why does char* cause undefined behaviour while char[] doesn't?

c string char undefined-behavior

C code with undefined results, compiler generates invalid code (with -O3)

c gcc undefined-behavior

Why specializing a type_trait could result in undefined behaviour?

c++ c++11 language-lawyer undefined-behavior c++14

Undefined behaviour with const_cast

c++ undefined-behavior const-cast

Order of evaluation of arguments in function calling?

c undefined-behavior calling-convention

How does std::launder affect containers?

c++ undefined-behavior c++17

Generic char[] based storage and avoiding strict-aliasing related UB

c++ c++11 undefined-behavior strict-aliasing type-punning

Can an object erase itself from a standard C++ container? [duplicate]

c++ containers undefined-behavior

Does undefined behavior affect static_assert?

c++ undefined-behavior static-assert

What happens if undefined C++ behaviour meets C defined behaviour?

c++ c undefined-behavior

Using std:vector as low level buffer

c++ stl language-lawyer stdvector undefined-behavior

Which integral promotions do take place when printing a char?

c printf undefined-behavior variadic-functions integer-promotion
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