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New posts in undefined-behavior

Why does operator* of rvalue unique_ptr return an lvalue?

c++ c++11 undefined-behavior unique-ptr rvalue-reference

Weird behavior with a manually defined strlen

c++ std language-lawyer undefined-behavior

Do parentheses force order of evaluation and make an undefined expression defined?

c++ c expression undefined-behavior operator-precedence

Is it well-defined/legal to placement-new multiple times at the same address?

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

Does not evaluating the expression to which sizeof is applied make it legal to dereference a null or invalid pointer inside sizeof in C++?

c++ language-lawyer sizeof undefined-behavior null-pointer

Does `int a = 0, b = a` have undefined behavior? [duplicate]

c++ declaration undefined-behavior

Is `*--p` actually legal(well formed) in C++03

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

Why does Rust disallow mutable aliasing?

rust undefined-behavior lifetime

In C, if I cast & dereference a pointer, does it matter which one I do first?

c casting undefined-behavior

How to spot undefined behavior

c++ c undefined-behavior

Assigning a reference by dereferencing a NULL pointer

c++ pointers reference undefined-behavior null-pointer

Is using sizeof on a variable where a type of the same name exists well defined?

c sizeof undefined-behavior

Are there sequence points in the expression a^=b^=a^=b, or is it undefined?

c undefined-behavior sequence-points compound-assignment

GCC 4.8 with GNU STL produces bad code for std::string constructor?

c++ gcc stl undefined-behavior

How do we explain the result of the expression (++x)+(++x)+(++x)?

c++ undefined-behavior operator-precedence

What replacements are available for formerly-widely-supported behaviors not defined by C standard

c language-lawyer undefined-behavior

"Illegal hardware instruction" from very simple code

c standards undefined-behavior

Is i += ++i undefined behavior in C++0x?

c++ c++11 undefined-behavior compound-assignment

Is it well-defined to cast xvalues to lvalues for passing to functions?

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