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New posts in undefined-behavior
How much does the C standard library extensibility affect C++ programs?
Sep 22, 2022
c++
c
language-lawyer
undefined-behavior
reserved-words
Is it undefined behavior to exceed translation limits and are there checker tools to find it?
Dec 20, 2015
c
standards
undefined-behavior
standards-compliance
c89
Different results for idiv instruction
Nov 13, 2022
c
undefined-behavior
mingw-w64
integer-division
Segmentation fault on gcc caused by lambda wrapper over variadic template function call
Mar 05, 2021
c++
segmentation-fault
c++14
undefined-behavior
ubsan
Is it well-defined behaviour to exit the program before main?
Feb 13, 2022
c++
exit
main
undefined-behavior
Is this downcasting undefined?
Feb 10, 2022
c++
undefined-behavior
downcast
Non-trivial example of undefined behavior with const_cast
Apr 07, 2022
c++
undefined-behavior
Are non-terminating constexpr functions well-defined?
Jan 17, 2019
c++
infinite-loop
undefined-behavior
constexpr
c++14
Division by zero and undefined behaviour in C
Feb 19, 2022
c
language-lawyer
undefined-behavior
uninitialized local variable with c++11 default
Oct 27, 2022
c++
c++11
undefined-behavior
default-constructor
Is an (empty) infinite loop undefined behavior in C?
Oct 18, 2022
c
infinite-loop
undefined-behavior
Throwing C++ exception through C function call
Oct 19, 2020
c++
c
function
exception
undefined-behavior
Do aliasing mutable raw pointers (*mut T) cause undefined behaviour?
Aug 26, 2022
rust
undefined-behavior
unsafe
Is it undefined behavior to #define/#undef an identifier with special meaning?
Oct 24, 2022
c++
c++11
language-lawyer
undefined-behavior
Why does operator* of rvalue unique_ptr return an lvalue?
Oct 10, 2022
c++
c++11
undefined-behavior
unique-ptr
rvalue-reference
Weird behavior with a manually defined strlen
Jul 03, 2022
c++
std
language-lawyer
undefined-behavior
Do parentheses force order of evaluation and make an undefined expression defined?
Nov 04, 2022
c++
c
expression
undefined-behavior
operator-precedence
Is it well-defined/legal to placement-new multiple times at the same address?
Sep 24, 2022
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++?
Apr 26, 2017
c++
language-lawyer
sizeof
undefined-behavior
null-pointer
Does `int a = 0, b = a` have undefined behavior? [duplicate]
Oct 27, 2022
c++
declaration
undefined-behavior
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