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New posts in undefined-behavior

So why is i = ++i + 1 well-defined in C++11?

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

What specific hash algorithm does MessageDigest.getInstance("SHA") return?

java cryptography undefined-behavior

Why did this code still work?

c undefined-behavior

What's the best C++ way to multiply unsigned integers modularly safely?

c++ portability undefined-behavior multiplication

Difference between Undefined Behavior and Ill-formed, no diagnostic message required

c++ language-lawyer undefined-behavior

Is this undefined behaviour in C ? If not predict the output logically

c output pass-by-reference undefined-behavior

Is incrementing a pointer to a 0-sized dynamic array undefined?

c++ pointers undefined-behavior dynamic-arrays

Is while(1); undefined behavior in C?

c infinite-loop undefined-behavior

Why is out-of-bounds pointer arithmetic undefined behaviour?

c++ undefined-behavior

Copying structs with uninitialized members

c++ initialization copy-constructor undefined-behavior

"is not required" == undefined behavior?

c++ pointers language-lawyer undefined-behavior comparison-operators

C standard compliant way to access null pointer address?

c language-lawyer undefined-behavior null-pointer

Weird behaviour with class fields when adding to a std::vector

c++ vector stdvector undefined-behavior push-back

In which versions of the C++ standard does "(i+=10)+=10" have undefined behaviour?

c++ c++11 undefined-behavior language-lawyer c++03

What's the reason for letting the semantics of a=a++ be undefined?

c undefined-behavior language-lawyer

Arithmetic right shift gives bogus result?

c++ gcc undefined-behavior bit-shift

Why doesn't vector::clear remove elements from a vector?

c++ stdvector undefined-behavior

Why isn't arr[-2] equivalent to -2[arr]?

c++ arrays undefined-behavior

Difference in the end of lifetime rules?

c++ language-lawyer undefined-behavior

Do I need to cast to unsigned char before calling toupper(), tolower(), et al.?

c++ language-lawyer undefined-behavior toupper tolower
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